Flexion Single retrofit kit for single extruder

Single Flexion 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 (and PLUS). Print with flexible materials, higher resolution, and fewer failures. Also prints ABS and PLA better than your stock extruder.

*Does not include stepper motor.

Printer type - Standard Single
Flexion extruder kit for single-extruder printers, including Wanhao Duplicator i3, Monoprice Maker Select, Cocoon Create, and many others.

Note: kits now ship with the finned mounting block, similar to the HT version. If you have a HICTOP printer, or another that uses a single M6 mounting screw, please make a note of it so we can ship you a compatible mounting block.

Printer type - Makerbot Replicator 2
Replaces the Makerbot Replicator 2 extruder, pictured to the left. You will need to remove or replace the plastic plate above the extruder.

Printer type - HT Bundle 
This kit includes everything in the standard Flexion Single kit, but with an additional high-temperature (HT) hotend. This allows fast swapping of the hotend for switching between ultra-flexible and high-temp printing.

  • $149.00
  • SKU

3D printer extruder retrofit kit for single-extruder direct-drive machines, such as the Wanhao Duplicator i3 (and PLUS), 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. 

This kit requires you to disassemble your printer’s extruder and reinstall this upgrade. 

Works with

i3 printers. Designed for 2x M3 mount at 31mm spacing (Wanhao Duplicator i3 (and PLUS), Monoprice Maker Select (and PLUS) ). If you have a single M6 mounting screw, such as with HICTOP, make a note on your order for a special mounting block. Will also work with Folgertech printers, or other printers that mount to the back of the extruder motor. 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
3 nozzles – 0.3, 0.4, 0.5 mm orifice
Adapter shim to allow 6mm and 0.25" heater cartridges
2 PTFE feed tubes (one can be used an an inlet tube)
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

Weight2 oz
Dimensions3.5 × 4.5 × 1.25 in
  • Manufacturer
    Diabase Engineering
  • Brand
    Diabase Engineering
  • Choose Printer type
    Standard Single - $149, Makerbot Replicator 2 - $149, HT Bundle - $179

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