West3D and POWGE have partnered up to provide you with a range of motion kits. If you want to take care of your motion components (minus rails) with all the best quality parts, this POWGE with GATES kit is what you want.
GT2 20T (6mm wide) (5mm bore)---3pcs
GT2 20T (6mm wide) Toothed Idler (5mm bore)---2pcs
5x30mm Shaft ----------- 1pcs
GE5C Spherical Bearing----3pcs