Roller Chain Sprocket Bore Diameter 2 in For Chain Pitch 1 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 2 in Number of Teeth 32 Outside Diameter 10.75 in Pitch Diameter 10.202 in Bore Type Fixed Chain Number 80 Finish Black Oxide Hub Diameter 4 3/4 in Hub Projection 1.425 in Includes Set Screws Keyway Yes Keyway Width 1/2 in Length through Bore 2 in Number of Set Screws 2