Olearn All Metal Reprap 42 Stepper Motor Bowden Extruder

Olearn All Metal Reprap 42 Stepper Motor Bowden Extruder

Features:
1. Special design, easy to adjust the tension of springs and filament.
You can fix it on any place you want.
2. This bowden extruder can use 1.75 mm and 3 mm filament, just need to change the  joint couplers.
3. Extrusion Wheel Bore Size: 5mm, Or 8mm（default is 5mm）
4. it is used with 42 Stepper Motors