Stepped V-Belt Pulley, Bore Diameter 5/8 in, Finish Zinc Plated, For Belt Trade Size 4L, A, For V-Belt Type Classical, Largest Step Outside Diameter 6 in, Material Zinc, Number of Steps 4, Smallest Step Outside Diameter 3 in, Step Outside Diameters 3 in, 4 in, 5 in, 6 in, Includes Set Screws, Keyway Yes, Length through Bore 2 11/32 in, Material Fabrication Cast, Material Grade Zamak 3, Overall Width 2 17/32 in, Resistance Properties , Spark Free, Weight 2.5 lb