20 teeth 2GT Timing Pulley Bore 3.175/4/5/6/6.35mm for GT2 Open Synchronous belt width 6mm/10/15mm small backlash 20Teeth 20T WholesaleBuy Directly From Shop911189128 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.