Stanley Hardware V7633 Series S730-720 Pulley, 4-1/4 in Dia, 0.56 in Dia Bore, 1-Groove, Galvanized Steel

For use on overhead sectional wood and steel one-car garage doors up to 9 ft wide with extension springs. 18 ga steel. 4 in pulley is for use on overhead sectional wood and steel two-car garage doors up to 18 ft wide with extension springs and for use on doors requiring four extension springs. 14 ga steel. Each can be used as a stationary pulley or as a spring pulley. Both pulleys feature ball bearing construction and are factory lubricated to extend operating life. With fork, axle bolt and nut.