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Extruder gear inner bore: 5mm. ( You can change according to the actual situation,for example, use MK7 Bore 5mm gear)
Designed for 1.75mm filament,Pipe outer diameter need ＜4.2mm
Symmetrical design (The motor can be installed in the left or right side).
Complete assembled and tested.
All - metal extruder.
Extruder drive is stable and accurate.
Direct drive extruder.
Suitable for 42 stepper motors and precision planetary reducer motor.
Can be driven as short range or remote extruder.
Easy to replace filament , you just need pushing it.
Compatible with E3D / J-head / MK8 etc.