Extruder Aluminum feeder kit with adjustable bolt,Used for 1.75mm filament of 3D printer MK8 bowden extruder frame

Building instruction:
https://drive.google.com/open?id=1kVgaGMqNw5eEjd-3Ku6trAOs48OevOig

This kit includes:

1 x extruder base

1 x tension lever

1 x 694zz U-groove Idler wheel

1 x 694zz bearing

1 x bearing cover

1 x Brass drive gear

1 x Push-in Fitting

1 x High tension spring

1 x Assembly screw set