Reddit reviews LICTOP 2GT Aluminum Timing Belt Idler Pulley GT2 5mm Bore 6mm Width Toothless for 3D Printer Timing Belt,Pack of 10

Package includes: 10 x Timing belt pulleys; Teeth type: without teethDrilling diameter: 5mm/0.2", Sutible for GT2 6mm/0.24" wide timing belt.Material: Aluminum, surface oxidation treatment, effective rust prevention, anti-corrosionDouble bearings: Use high quality motor grade bearings to ensure good machine operation.Widely used in milling machines, gear forming machines, drilling machines, CNC machine tools, hobbing machines or other mechanical transmission applications.