2019-6-12 · Timing belts (T2.5, T5, etc.) are highly discouraged in favor of GTor GTbelts. Make sure that the belt holder matches the belt you choose. (The belt holder is one of the 3D printed parts above.) 2x 6mm wide GTbelt pieces (760? And 900? mm long) for x axis, for y package with all of the above cut from 2m circumference belt.