Flexion Extruder Single Extruder Kit - High-Temp Bundle

$ 209.00 $ 179.00
$ 179.00
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High - Temp Bundle

Flexion extruder retrofit kit for single extruder

Developed by the inventor of Ninjaflex
Drop-in 3D printer extruder retrofit kit for i3-style printers like the Wanhao Duplicator i3. Print with flexible materials, higher resolution, and fewer failures. Also prints ABS and PLA better than your stock extruder.

*Does not include stepper motor.

High - Temp Bundle

This kit includes everything in the standard Flexion Single kit, but with an upgraded mounting block and an additional high-temp hotend. This allows fast swapping of the hotend for switching between ultra-flexible and high-temp printing.



Only works with 1.75mm Filament.

Developed by the inventor of Ninjaflex


Product Description

3D printer extruder retrofit kit for single-extruder direct-drive machines, such as the Wanhao Duplicator i3, Monoprice Maker Select, or Makerbot rep2 (see pulldown menu). The Flexion extruder will allow full-speed printing of flexible filaments and improved accuracy printing with PLA and ABS. The precision machined components allow your printer to push on filament harder, achieve high pressure in the nozzle, and control of feed rates very closely. The self-cleaning drive will keep your long prints from failing due to a clogged drive. Works will with Ninjaflex, Filaflex, flexible PLA, TPU, TPE ultra-flexible filament down to 50 Shore A, and all the standard rigid filaments like ABS and PLA.


The Flexion Extruder uses a high-stiffness lever to compress the filament. The compression is controlled with a cam and an adjust screw, rather than the traditional spring. This allows more tension and more precise control of the tension. To learn more about the benefits and drawbacks of this system, please read our blog post about it.

This kit requires you to disassemble your printer’s extruder and reinstall this upgrade. Detailed instructions on this process can be found on our support page.


Additional Information

Weight .1 lbs
Dimensions 3.5 x 4.5 x 1.25 in
Works with

i3 printers. Designed for 2x M3 mount at 31mm spacing (Wanhao Duplicator i3, Monoprice Maker Select) or a single M6 screw. See Support page for information on retrofitting to your printer.


Mounting block
Tensioning arm with idler and cleaning brush
Adjustment cam
Drive gear
Feed barrel
Heater block
Insulation for heater block
4 nozzles – 0.2, 0.3, 0.4, 0.5 mm orifice
Adapter shim to allow 6mm and 0.25″ heater cartridges
3 PTFE feed tubes
Spare cleaning brush
All mounting hardware
6mm and 7mm wrench for installing nozzles
“Flexion inside” quick-guide sticker

Note: does not include stepper motor or motor mounting screws

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