"This Phoenix 2 3/4in. Flat Idler Pulley Wheel with 5/8in. bore offers smooth operation, high speed performance and long life. U.S.A. Product Style Flat idler pulley, Pulley Diameter in. 2 3/4, Bore Diameter in. 5/8, Compatible With Outdoor power equipment, Material Type Metal, Part Type Pulleys. 5/8in. bore idlers can be reduced to 3/8in. or 1/2in. with bushings Precision ground bearings with double seals protect against dirt and moisture for high speeds and long life"