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3D Printer Hotend Block – Aluminum 20x20x10mm for Heating Extrusion

My order arrived quickly and exactly as described. Really impressed with the quality, will definitely be ordering again.

Jessica L.

3D Printer Hotend Block – Aluminum 20x20x10mm for Heating Extrusion

4.8/5 (53 reviews)

Sale price  $39.99 Regular price  $74.99 SAVE 47%
  • Simple and practical everyday product
  • Designed for convenience and ease of use
  • Lightweight and easy to store
  • Great gift or personal purchase
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Product Details

This MK8 extrusion hotend heating block is a replacement component designed for MK8/MK9 extruders with a V5 J-head. It’s ideal for hobbyists upgrading or repairing 3D printers.

Key Features

  • 40W ceramic heater (6x20 mm) delivers reliable heat and quick warm-up for consistent extrusion, compatible with 12V or 24V printer systems.
  • 100K NTC thermistor (B3950 ±1%) provides accurate temperature readings to support stable prints and better layer adhesion.
  • Compact 20x20x10 mm aluminum heating block with M6x1 holes for nozzle and throat, designed to fit MK8/MK9 extruders and the V5 J-head.
  • 1 meter heater wire length with color options (red or white insulation) for easy routing and safer handling.
  • Simple, plug-in replacement option that works with common hotend assemblies in MK8/MK9 configurations.

Product Details

  • Brand: 5Aplusreprap
  • Model numbers: HKMK12, HKMK24
  • For: MK8/MK9 extruder, V5 J-head
  • Block size: 20 x 20 x 10 mm
  • Heater: Ceramic heater 6x20 mm
  • Thermistor: 100K NTC B3950 ±1%
  • Voltage: 12V or 24V (optional)
  • Rated power: 40W
  • Wires: 1 meter length
  • Holes for nozzle/throat: M6 x 1
  • Thermistor connector: 2 pins Dupont
  • Color option: red heater wire or white heater wire (insulation differs for touch comfort)
  • Material: Aluminum
  • Origin: Mainland China
  • Package: 1 piece heating aluminum block kit

Additional Information

Product appearance, packaging, and minor details may vary slightly depending on the supplier or manufacturing batch.

If you have questions about a product before purchasing, please contact our support team and we will be happy to assist.

Shipping + Returns

Orders are processed within 1–4 business days before dispatch. Once shipped, delivery typically takes 7–15 business days depending on your location and demand.

Tracking information will be sent to your email once your order has been dispatched.

We offer a 30-day return window. If your item arrives damaged, defective, or incorrect, please contact our support team within 30 days of delivery and we will assist with a replacement or refund.

For full details, please refer to our Shipping Policy and Returns Policy pages.

3D Printer Hotend Block – Aluminum 20x20x10mm for Heating Extrusion

3D Printer Hotend Block – Aluminum 20x20x10mm for Heating Extrusion

Regular price  $74.99
Sale price  $39.99
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