BIQU GT2 5mm Bore Aluminum Toothless Timing Belt Idler Pulley for 3D Printer 6mm Width Timing Belt (Pack of 5pcs) Description Specifications: Bore Diameter: 5mm Net Weight: 3g/pcs Material: Aluminum Package Included: 5GT2 Toothless Timing Belt Pulley Features: Use for GT2 6mm Wide Timing Belt Toothless timing blet pulley, use with 20T 5mm bore idler pulley Bore Diameter: 5mm Net Weight: 3g/pcs Widely used in milling machine, gear shaper, drilling machine, CNC engine lathe, hobbing machine or other machinery transmission occasions Product Details: Is Discontinued By Manufacturer ‏ : ‎ No Package Dimensions ‏ : ‎ 3.5 x 3 x 0.6 inches; 0.71 Ounces Item model number ‏ : ‎ BIQU-H306 Date First Available ‏ : ‎ June 15, 2016 Manufacturer ‏ : ‎ BIQU Best Sellers Rank: #108,377 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #1,732 in 3D Printer Accessories #1,732 in 3D Printer Accessories Customer Reviews: 4.5 4.5 out of 5 stars 340 ratings