Cheap And Discounts 3D Printer 2GT 16T 20 Teeth Idler Pulley Bore 3 4 5 6MM With Bearing 6 9 10 15MM GT2 Synchronous Whell Timing Pulley idle Gear Wholesale. Buy Directly From Merchant Junbao 3D Printer Accessories Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.