DIY Reprap Bulldog All-metal Extruder For 1.75mm Compatible J-head MK8 Extruder Remote Proximity For 3D Printer Parts

Description 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 2mmFeatures 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