Roller Chain Sprocket Bore Diameter 32 mm For Chain Pitch 1 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 32 mm Number of Teeth 11 Outside Diameter 4.1 in Pitch Diameter 90.16 mm Bore Type Fixed Chain Number 16B Finish Black Oxide Hub Diameter 63 mm Hub Projection 0.937 in Includes Set Screws Keyway Yes Keyway Width 10 mm Length through Bore 40 mm Number of Set Screws 2