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 Corrosion Resistant Spark Free Weight 2.5 lb