Roller Chain Sprocket Bore Diameter 7/8 in For Chain Pitch 3/8 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 7/8 in Number of Teeth 15 Outside Diameter 1.99 in Pitch Diameter 1.804 in Bore Type Fixed Chain Number 35 Finish Black Oxide Hub Diameter 1 3/8 in Hub Projection 0.582 in Includes Set Screws Keyway Yes Keyway Width 3/16 in Length through Bore 3/4 in Number of Set Screws 2