"This Phoenix 2 5/8in. V Idler Pulley Wheel with 3/8in. bore offers smooth operation, high speed performance and long life. Pulley Diameter in. 2 5/8, Compatible With Outdoor power equipment, Part Type Pulleys, Bore Diameter in. 3/8, Material Type Steel, Product Style V idler pulley. Precision ground bearings with double seals protect against dirt and moisture for high speeds and long life"