Gearbelt Pulley, Bore Diameter 1 in, For Belt Series SilentSync, For Belt Width 35 mm, For Use With SilentSync Blue Belts, Material Steel, Number of Teeth 38, Outside Diameter 166.55 mm, Pitch 14 mm, Pitch Diameter 169.35 mm, Bore Type Plain, Face Width 37 mm, Features Self-Tracking Design, For Belt Trade Size B-38S, Keyway No, Keyway Depth Not Applicable, Keyway Width Not Applicable, Length through Bore 37 mm, Material Fabrication Machined, Maximum Operating Temperature 200 Degrees F