BZ 3D Upgrade MK2MK3 Parts Drive Gear Kit Cloned B tech Dual Gears Steel Pulleys Kit Gears Extrusion Wheel for DIY Prusa i3 2 Set

How to use,pls follow the steps: 1.press the nuts to the slots on both sides of the idler 2.Ensure both bearings are inside the pulley! 3.Insert the pulley in idler as shown in the picture. 4.Slide the shaft through the idler and pulley.Use reasonable force or you will BREAK the printed part. 5.Place your finger on the bearing and ensure it can rotate freely. 6.Insert both bearings in the pulley,Be aware that bearings can slip out during assembly.(Layers might be visible in this printed part due to the geometry .The functionality and strength remain unaffected) Package includes: 2 x Drive Wheel (Without screw hole) 2x Drive Wheel (With M3 screw hole) 4 x Bearing 4 x M3 Nut 2 x Drive wheel shaft 2 x Allen wrench