Cheap And Discounts 16T 20T 2GT Idler Timing Pulley Bore3/4/5/6mm Width 6/10/15mm GT2 Synchronous Belt 3D Printer CNC Parts Idler Type Pitch 2mm 20T Wholesale. Buy Directly From Merchant TangShi Parts Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.