Roller Chain Sprocket, Bore Diameter 3/4 in, For Chain Pitch 3/8 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 3/4 in, Number of Teeth 23, Outside Diameter 2.95 in, Pitch Diameter 2.754 in, Bore Type Fixed, Chain Number 35, Finish Black Oxide, Hub Diameter 2 in, Hub Projection 0.707 in, Includes Set Screws, Keyway Yes, Keyway Width 3/16 in, Length through Bore 7/8 in, Number of Set Screws 2