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Bambulab Hotend H2d

Die 10 besten Produkte von Juni 2025
Letzte Aktualisierung: 9. Juni 2025
JUUPINE
JUUPINE
JUUPINE 2 Pack for Bambu Hotend - H2D 0.4mm Hardened Steel Hotend High Flow Fast Print Extruder Kit (Extra 2 Silicone Socks), Faster Print Speed, Suitable for 3D Printer Bambu Lab H2D ACE Pro
Kostenloser Versand
star

99

MAXIMALE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#1 GEWINNER

  • High Flow One-Piece H2D Hotend: 65mm³/s Max Volumetric Speed ​​High Flow H2D 0.4mm Hardened HotendHigh Flow quick change hardened steel nozzle replacement kit for Bambu Lab H2D/A1/A1 Mini. This kit contains two high flow hotends and 4 replaceable silicone sleeves.
  • 0.4mm Standard Size: This precision printing high flow H2D hotend extruder uses a 0.4mm diameter hardened steel nozzle, which takes into account both printing speed and quality, making it an ideal choice for everyday applications. It is often used to print toys, mechanical parts and decorations. After many extensive tests, Bambu PLA-CF and Bambu PETG-CF use a standard 0.4mm diameter hardened steel nozzle, which can achieve higher print quality while reducing the risk of clogging during printing, effectively balancing printing speed and precision.
  • 【Save 30% of printing time】Engineered with optimized melt zone geometry, this bambu lab h2d high flow hotend delivers a 65mm³/s max volumetric speed—62.5% faster than standard nozzles,extruding more filaments to slash print times by 30% even on complex models. Its 1000mm³/s+ toolhead speed ensures precise high-speed positioning, reducing line defects while enabling smooth printing of intricate designs. The advanced geometry boosts unit-time output for batch or large-scale production, cutting time costs for enterprises—especially effective on models with dense infill where time savings are most pronounced.
  • Quick-Change Nozzle Design: The H2D hot end heating assembly is specially designed to easily separate the heating element and electronic components of the hot end. The hot end can be quickly and easily removed and installed by simply unlocking the latch. Before replacing, make sure the hot end has cooled down, and avoid touching the heating block (the lower part of the hot end) to avoid burns.
  • Ultra-Durable Material: This H2D hot end nozzle is made of hardened steel SKD11 material with a smooth inner wall to reduce clogging and improve printing quality. The hot end has a maximum printing temperature of up to 350°C and can print a variety of filaments, such as common filaments such as PLA/PETG/TPU/ABS.
  • 59,59 € AUF AMAZON
JUUPINE
JUUPINE
JUUPINE 2 Pack for Bambu Hotend - H2D 3D Printer 0.2mm Hardened Steel Hot End Regular Extruder Kit (with 2 Silicone Socks), for Bambu Lab H2D ACE Pro, Optimal Print Fineness
12% Rabatt Kostenloser Versand
star

96

BESTE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#2

  • Upgraded detachable nozzle design: The original h2d hot end is an integrated design, and the nozzle and the throat are inseparable; while our upgraded and improved h2d hot end print head kit can achieve 18 seconds quick nozzle replacement. Users no longer need to replace the entire print head hot end due to nozzle blockage or damage, and can directly replace nozzles of different diameters for printing, which is convenient and efficient, bringing a better printing experience.
  • Compatible models and packaging: This h2d hot end kit is not only suitable for bambu lab h2d 3D printers, but also for bambu lab a1 and bambu lab a1 mini. The hot end is pre-installed with a 0.2 mm hardened steel nozzle, and we also have 2 hot ends and 2 replaceable silicone sleeves in the package.
  • Quick replacement: The magnetic suction block on the Bambu lab h2d hot end heating assembly can quickly and accurately fix the nozzle to the installation position, making the removal and installation of the nozzle easy and convenient. Before replacement, make sure the hot end has cooled down and avoid touching the heating block at the bottom of the hot end to prevent burns.
  • High hardness, smooth inner wall and no clogging: This bambu lab h2d nozzle is made of hardened steel SKD11, and the surface is treated with DLC nano-treatment, which can withstand high temperatures of 550°C; the surface of the heating block is plated with chromium zirconium copper nickel, which has fast heat conduction and high temperature resistance; the roughness of the throat and the inner wall of the nozzle is Ra 0.2, and the inner wall is smooth, which can reduce clogging and improve printing quality.
  • Wide compatibility: The bambu lab h2d hot end kit is compatible with 1.75mm filaments, including PLA, ABS, PETG, TPU, PC, PP, nylon and PEEK. The smaller the 0.2mm caliber nozzle, the higher the model accuracy and prints higher quality models.
  • How to remove and replace the nozzle instructions: 1. Remove the silicone sleeve, install the hot end and heat to 250°C; 2. Use a 5.0 wrench to clamp the groove of the heating block, and a 3.0 wrench to clamp the nozzle, and turn the 3.0 wrench clockwise to remove the nozzle; turn counterclockwise to tighten the nozzle.
  • Note: Our products will be checked before shipment, but it is inevitable that the nozzle will be loose due to transportation. Therefore, after receiving the package, it is recommended to heat tighten the nozzle to prevent leakage. If you encounter any problems, please contact us as soon as possible and we will reply you as soon as possible.
  • 37,59 € AUF AMAZON
HIKUDIY
HIKUDIY
HIKUDIY 0,2 mm Hartstahl Hotend für Bambu Lab H2D, Extruder-Druckkopf-Ersatz, abnehmbare Düse, schnelles Wechsel-Hotend-Design für Bambulab H2D 3D-Drucker
Kostenloser Versand
star

93

TOP QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#3

  • Hochleistungs-Heizelement: Dieses Hotend-Kit ist mit dem Bambu Lab H2D 3D-Drucker kompatibel und verfügt über ein fortschrittliches Heizelement, das schnell die gewünschte Temperatur erreicht und einen stabilen sowie effizienten Druckprozess gewährleistet
  • Präzise Temperaturregelungstechnologie: Mit modernster Temperaturregelungstechnologie bietet das H2D Hotend eine präzise Temperaturkontrolle, die ein gleichmäßiges Schmelzen des Materials gewährleistet und die gesamte Druckqualität verbessert
  • Schnelles Austausch-Design: Das H2D Hotend-Heizelement mit einem Magnetblock kann das Hotend schnell und präzise an der Installationsposition fixieren, was das Entfernen und Installieren des Hotends einfach und bequem macht. (Hinweis: Stellen Sie sicher, dass das Hotend abgekühlt ist, bevor Sie es ersetzen, und vermeiden Sie es, den Heizblock unter dem Hotend zu berühren, um Verbrennungen zu verhindern.)
  • Super haltbares Material: Diese Düse besteht aus gehärtetem Stahl SKD11, mit einer glatten Innenwand, die Verstopfungen reduziert und die Druckqualität verbessert. Die maximale Temperatur kann 500°C erreichen, und die Härte liegt über HRC60, was den Abrieb an der Innen- und Außenseite der Düse bei langem Drucken verringert und so hochwertigen Druck ermöglicht
  • Breite Kompatibilität: Das H2D Hotend ist mit einer Vielzahl von 3D-Druckmaterialien kompatibel, darunter PLA, ABS, PETG und mehr. （!!! Hinweis: Wenn Sie unser H2D Hotend zum Ersetzen der Düse verwenden, kann es sein, dass unterschiedliche Düsendurchmesser nicht korrekt erkannt werden. In diesem Fall müssen Sie die Düsengröße manuell auf die entsprechende Größe einstellen.）
  • 20,97 € AUF AMAZON
JUUPINE
JUUPINE
2 Pack for Bambu Hotend - H2D 3D Printer 0.6mm Hardened Steel Hot End Regular Extruder Kit (with 2 Silicone Socks), Optimal Print Fineness, for Bambu Lab H2D ACE Pro
12% Rabatt Kostenloser Versand
star

89

HOHE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#4

  • Upgraded detachable nozzle design: The original h2d hot end is an integrated design, and the nozzle and the throat are inseparable; while our upgraded and improved h2d hot end print head kit can achieve 18 seconds quick nozzle replacement. Users no longer need to replace the entire print head hot end due to nozzle blockage or damage, and can directly replace nozzles of different diameters for printing, which is convenient and efficient, bringing a better printing experience.
  • Compatible models and packaging: This h2d hot end kit is not only suitable for bambu lab h2d 3D printers, but also for bambu lab a1 and bambu lab a1 mini. The hot end is pre-installed with a 0.6mm hardened steel nozzle, and we also have 2 hot ends and 4 replaceable silicone sleeves in the package.
  • Quick replacement: The magnetic suction block on the Bambu lab h2d hot end heating assembly can quickly and accurately fix the nozzle to the installation position, making the removal and installation of the nozzle easy and convenient. Before replacement, make sure the hot end has cooled down and avoid touching the heating block at the bottom of the hot end to prevent burns.
  • High hardness, smooth inner wall and no clogging: This bambu lab h2d nozzle is made of hardened steel SKD11, and the surface is treated with DLC nano-treatment, which can withstand high temperatures of 550°C; the surface of the heating block is plated with chromium zirconium copper nickel, which has fast heat conduction and high temperature resistance; the roughness of the throat and the inner wall of the nozzle is Ra 0.6, and the inner wall is smooth, which can reduce clogging and improve printing quality.
  • Wide compatibility: The bambu lab h2d hot end kit is compatible with 1.75mm filaments, including PLA, ABS, PETG, TPU, PC, PP, nylon and PEEK. The smaller the 0.6mm caliber nozzle, the higher the model accuracy and prints higher quality models.
  • How to remove and replace the nozzle instructions: 1. Remove the silicone sleeve, install the hot end and heat to 250°C; 2. Use a 5.0 wrench to clamp the groove of the heating block, and a 3.0 wrench to clamp the nozzle, and turn the 3.0 wrench clockwise to remove the nozzle; turn counterclockwise to tighten the nozzle.
  • Note: Our products will be checked before shipment, but it is inevitable that the nozzle will be loose due to transportation. Therefore, after receiving the package, it is recommended to heat tighten the nozzle to prevent leakage. If you encounter any problems, please contact us as soon as possible and we will reply you as soon as possible.
  • 37,59 € AUF AMAZON
JUUPINE
JUUPINE
2-Pack Bambu Hotend - H2D 3D Printer 0.8mm Hardened Steel Hotend Regular Extruder Kit (Including 2 Silicone Socks), High Efficiency and Fast Replaceable Print Head Kit for Bambu Lab H2D ACE Pro
Kostenloser Versand
star

82

SICHERE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#5

  • Upgraded detachable nozzle design: The original h2d hot end is an integrated design, and the nozzle and the throat are inseparable; while our upgraded and improved h2d hot end print head kit can achieve 18 seconds quick nozzle replacement. Users no longer need to replace the entire print head hot end due to nozzle blockage or damage, and can directly replace nozzles of different diameters for printing, which is convenient and efficient, bringing a better printing experience.
  • Compatible models and packaging: This h2d hot end kit is not only suitable for bambu lab h2d 3D printers, but also for bambu lab a1 and bambu lab a1 mini. The hot end is pre-installed with a 0.8mm hardened steel nozzle, and the large-diameter nozzle can improve printing efficiency. We also have 2 hot ends and 4 replaceable silicone sleeves in the package.
  • Quick replacement: The magnetic suction block on the Bambu lab h2d hot end heating assembly can quickly and accurately fix the nozzle to the installation position, making the nozzle removal and installation easy and convenient. Before replacement, make sure the hot end has cooled down and avoid touching the heating block at the bottom of the hot end to prevent burns.
  • High hardness, smooth inner wall and no clogging: This bambu lab h2d nozzle is made of hardened steel SKD11, and the surface is treated with DLC nano-treatment, which can withstand high temperatures of 550°C; the surface of the heating block is plated with chromium zirconium copper nickel, which has fast thermal conductivity and high temperature resistance; the roughness of the throat and the inner wall of the nozzle is Ra 0.8, and the inner wall is smooth, which can reduce clogging and improve printing quality.
  • Wide compatibility: The bambu lab h2d hot end set is compatible with 1.75mm filaments, including PLA, ABS, PETG, TPU, PC, PP, nylon and PEEK. The nozzle with a 0.6mm diameter, the smaller the diameter, the higher the model accuracy, and prints higher quality models.
  • How to remove and replace the nozzle Instructions: 1. Remove the silicone sleeve, install the hot end and heat to 250°C; 2. Use a 5.0 wrench to clamp the heating block groove, a 3.0 wrench to clamp the nozzle, turn the 3.0 wrench clockwise to remove the nozzle; turn counterclockwise to tighten the nozzle.
  • Note: Our products will be inspected before shipment, but it is inevitable that the nozzle will be loose due to transportation. Therefore, after receiving the package, it is recommended to hot-tighten the nozzle to prevent leakage. If you encounter any problems, please contact us as soon as possible and we will reply you as soon as possible.
  • 37,59 € AUF AMAZON
HzdaDeve
HzdaDeve
HzdaDeve 2-Pack H2D 0.2MM Combo Hotend Druck Kopf Hot End Kit Extruder Upgrade Hochtemperatur gehärtete Stahldüse mit 2PCS Silikon Abdeckung Socke für Bambu Lab H2D Combo/A1/A1 Mini 3D Drucker
Kostenloser Versand
star

80

GUTE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#6

  • Hinweis: Dieser Ersatz des Hotend-Kits dem H2D Combo/A1/A1 Mini 3D-Drucker kompatibel.
  • Paket enthalten: 2-Set 0.2MM Hotend Kit und extra 2pcs Silikon Socke.
  • Premium Düsenqualität: Es besteht aus einem hochwertigen verchromten Messing-Heizblock, der Hitzebeständigkeit, Verschleißfestigkeit und Korrosionsbeständigkeit gewährleistet.
  • Filamentmaterial: Der Druckkopf für H2D Combo arbeitet mit 1.75 mm PLA/ABS/PETG/TPU/Wood Filament.
  • Einfache Installation: Entfernen Sie das alte Hot End und installieren Sie das neue Hotend zu starten.
  • 41,99 € AUF AMAZON
JUUPINE
JUUPINE
65mm³/s Max Volumetric Speed High Flow H2D 0.4mm Hardened Hotend Steel Nozzel Replacement Print Extruder Kit (Extra 1 Silicone Sock), Faster Print Speed, for Bambu Lab H2D ACE Pro
32% Rabatt Kostenloser Versand
star

78

GUTE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#7

  • High Flow All-in-One H2D Hotend: High Flow Quick Replacement Hardened Steel Nozzel Replacement kit for Bambu Lab H2D/A1/A1 Mini.
  • 0.4mm Standard Size: This precision printing high flow H2D hotend extruder uses a 0.4mm diameter hardened steel nozzle, which takes into account both printing speed and quality, making it an ideal choice for everyday applications. It is often used to print toys, mechanical parts and decorations. After many extensive tests, Bambu PLA-CF and Bambu PETG-CF use a standard 0.4mm diameter hardened steel nozzle, which can achieve higher print quality while reducing the risk of clogging during printing, effectively balancing printing speed and precision.
  • 【Save 30% of printing time】Engineered with optimized melt zone geometry, this bambu lab h2d high flow hotend delivers a 65mm³/s max volumetric speed—62.5% faster than standard nozzles,extruding more filaments to slash print times by 30% even on complex models. Its 1000mm³/s+ toolhead speed ensures precise high-speed positioning, reducing line defects while enabling smooth printing of intricate designs. The advanced geometry boosts unit-time output for batch or large-scale production, cutting time costs for enterprises—especially effective on models with dense infill where time savings are most pronounced.
  • Quick-Change Nozzle Design: The H2D hot end heating assembly is specially designed to easily separate the heating element and electronic components of the hot end. The hot end can be quickly and easily removed and installed by simply unlocking the latch. Before replacing, make sure the hot end has cooled down, and avoid touching the heating block (the lower part of the hot end) to avoid burns.
  • Ultra-Durable Material: This H2D hot end nozzle is made of hardened steel SKD11 material with a smooth inner wall to reduce clogging and improve printing quality. The hot end has a maximum printing temperature of up to 350°C and can print a variety of filaments, such as common filaments such as PLA/PETG/TPU/ABS.
  • 33,59 € AUF AMAZON
JUUPINE
JUUPINE
For Bambu Hotend - H2D 3D Printer 0.8mm Hardened Steel Hotend Regular Extruder Kit (with a replaceable silicone sock), for Bambu Lab H2D ACE Pro, fast printing high efficiency bambulab extruder kit
Kostenloser Versand
star

76

GUTE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#8

  • Upgraded detachable nozzle design: The original h2d hot end is an integrated design, and the nozzle and the throat are inseparable; while our upgraded and improved h2d hot end print head kit can achieve 18 seconds quick nozzle replacement. Users no longer need to replace the entire print head hot end due to nozzle blockage or damage. They can directly replace nozzles of different diameters for printing, which is convenient and efficient, bringing a better printing experience.
  • Compatible models and packaging: This h2d hot end kit is not only suitable for bambu lab h2d 3D printers, but also for bambu lab a1 and bambu lab a1 mini. The hot end is pre-installed with a 0.8mm hardened steel nozzle, and the large-diameter nozzle can improve printing efficiency. We also have 2 replaceable silicone sleeves in the package.
  • Quick replacement: The magnetic suction block on the Bambu lab h2d hot end heating assembly can quickly and accurately fix the nozzle to the installation position, making the nozzle removal and installation easy and convenient. Before replacement, make sure the hot end has cooled down and avoid touching the heating block at the bottom of the hot end to prevent burns.
  • High hardness, smooth inner wall and no clogging: This bambu lab h2d nozzle is made of hardened steel SKD11, and the surface is treated with DLC nano-treatment, which can withstand high temperatures of 550°C; the surface of the heating block is plated with chromium zirconium copper nickel, which has fast heat conduction and high temperature resistance; the roughness of the throat and the inner wall of the nozzle is Ra 0.8, and the inner wall is smooth, which can reduce clogging and improve printing quality.
  • Wide compatibility: The bambu lab h2d hot end kit is compatible with 1.75mm filaments, including PLA, ABS, PETG, TPU, PC, PP, nylon and PEEK. The smaller the 0.6mm caliber nozzle, the higher the model accuracy and prints higher quality models.
  • How to remove and replace the nozzle instructions: 1. Remove the silicone sleeve, install the hot end and heat to 250°C; 2. Use a 5.0 wrench to clamp the heating block groove, a 3.0 wrench to clamp the nozzle, and turn the 3.0 wrench clockwise to remove the nozzle; turn counterclockwise to tighten the nozzle.
  • Note: Our products will be checked before shipment, but it is inevitable that the nozzle will be loose due to transportation. Therefore, after receiving the package, it is recommended to heat tighten the nozzle to prevent leakage. If you encounter any problems, please contact us as soon as possible and we will reply you as soon as possible.
  • 22,59 € AUF AMAZON
JUUPINE
JUUPINE
For Bambu Hotend - H2D 3D Printer 0.6mm Hardened Steel Hotend Regular Extruder Kit (with Extra One Silicone Sock), for Bambu Lab H2D ACE Pro, Optimal Print Fineness
Kostenloser Versand
star

72

GUTE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#9

  • Upgraded detachable nozzle design: The original h2d hot end is an integrated design, and the nozzle and the throat are inseparable; while our upgraded and improved h2d hot end print head kit can achieve 18 seconds quick nozzle replacement. Users no longer need to replace the entire print head hot end due to nozzle blockage or damage, and can directly replace nozzles of different diameters for printing, which is convenient and efficient, bringing a better printing experience.
  • Compatible models and packaging: This h2d hot end kit is not only suitable for bambu lab h2d 3D printers, but also for bambu lab a1 and bambu lab a1 mini. The hot end is pre-installed with a 0.6mm hardened steel nozzle, and we also have 2 replaceable silicone sleeves in the package.
  • Quick replacement: The magnetic suction block on the Bambu lab h2d hot end heating assembly can quickly and accurately fix the nozzle to the installation position, making the removal and installation of the nozzle easy and convenient. Before replacement, make sure the hot end has cooled down and avoid touching the heating block at the bottom of the hot end to prevent burns.
  • High hardness, smooth inner wall and no clogging: This bambu lab h2d nozzle is made of hardened steel SKD11, and the surface is treated with DLC nano-treatment, which can withstand high temperatures of 550°C; the surface of the heating block is plated with chromium zirconium copper nickel, which has fast heat conduction and high temperature resistance; the roughness of the throat and the inner wall of the nozzle is Ra 0.6, and the inner wall is smooth, which can reduce clogging and improve printing quality.
  • Wide compatibility: The bambu lab h2d hot end kit is compatible with 1.75mm filaments, including PLA, ABS, PETG, TPU, PC, PP, nylon and PEEK. The smaller the 0.6mm caliber nozzle, the higher the model accuracy and prints higher quality models.
  • How to remove and replace the nozzle instructions: 1. Remove the silicone sleeve, install the hot end and heat to 250°C; 2. Use a 5.0 wrench to clamp the groove of the heating block, and a 3.0 wrench to clamp the nozzle, and turn the 3.0 wrench clockwise to remove the nozzle; turn counterclockwise to tighten the nozzle.
  • Note: Our products will be checked before shipment, but it is inevitable that the nozzle will be loose due to transportation. Therefore, after receiving the package, it is recommended to heat tighten the nozzle to prevent leakage. If you encounter any problems, please contact us as soon as possible and we will reply you as soon as possible.
  • 22,59 € AUF AMAZON
JUUPINE
JUUPINE
2 Pack for Bambu Hotend - H2D 3D Printer 0.4mm Hardened Steel Hot End Regular Extruder Kit (with 2 Silicone Socks), Optimal Print Fineness, Replaceable nozzles for Bambu Lab H2D ACE Pro
12% Rabatt Kostenloser Versand
star

66

GUTE QUALITÄT

AUF AMAZON ANSEHEN
Amazon.de
#10

  • Upgraded detachable nozzle design: The original h2d hot end is an integrated design, and the nozzle and the throat are inseparable; while our upgraded and improved h2d hot end print head kit can achieve 18 seconds quick nozzle replacement. Users no longer need to replace the entire print head hot end due to nozzle blockage or damage, and can directly replace nozzles of different diameters for printing, which is convenient and efficient, bringing a better printing experience.
  • Compatible models and packaging: This h2d hot end kit is not only suitable for bambu lab h2d 3D printers, but also for bambu lab a1 and bambu lab a1 mini. The hot end is pre-installed with a 0.4mm hardened steel nozzle, and we also have 2 hot ends and 2 replaceable silicone sleeves in the package.
  • Quick replacement: The magnetic suction block on the Bambu lab h2d hot end heating assembly can quickly and accurately fix the nozzle to the installation position, making the removal and installation of the nozzle easy and convenient. Before replacement, make sure the hot end has cooled down and avoid touching the heating block at the bottom of the hot end to prevent burns.
  • High hardness, smooth inner wall and no clogging: This bambu lab h2d nozzle is made of hardened steel SKD11, and the surface is treated with DLC nano-treatment, which can withstand high temperatures of 550°C; the surface of the heating block is plated with chromium zirconium copper nickel, which has fast heat conduction and high temperature resistance; the roughness of the throat and the inner wall of the nozzle is Ra 0.4, and the inner wall is smooth, which can reduce clogging and improve printing quality.
  • Wide compatibility: The bambu lab h2d hot end kit is compatible with 1.75mm filaments, including PLA, ABS, PETG, TPU, PC, PP, nylon and PEEK. The smaller the 0.4mm caliber nozzle, the higher the model accuracy and prints higher quality models.
  • How to remove and replace the nozzle instructions: 1. Remove the silicone sleeve, install the hot end and heat to 250°C; 2. Use a 5.0 wrench to clamp the groove of the heating block, and a 3.0 wrench to clamp the nozzle, and turn the 3.0 wrench clockwise to remove the nozzle; turn counterclockwise to tighten the nozzle.
  • Note: Our products will be checked before shipment, but it is inevitable that the nozzle will be loose due to transportation. Therefore, after receiving the package, it is recommended to heat tighten the nozzle to prevent leakage. If you encounter any problems, please contact us as soon as possible and we will reply you as soon as possible.
  • 37,59 € AUF AMAZON
bambulab h2d bambulab hotend bambulab hotend x1c bambulab x1c hotend bambulab x1e hotend microswiss hotend bambulab bambulab druckplatte h2d druckplatte bambulab h2d bambulab hotend v4