Sprocket, Bore Diameter 1/2 in, For Chain Pitch 1/2 in, For Number of Strands Single, Hub Type One Side, Material Steel, Maximum Bore Diameter 1/2 in, Number of Teeth 9, Outside Diameter 1.67 in, Pitch Diameter 1.462 in, Bore Type Fixed, Chain Number 40, Finish Black Oxide, Hub Diameter 1 1/16 in, Hub Projection 0.591 in, Includes Set Screws, Keyway No, Keyway Depth Not Applicable, Keyway Width Not Applicable, Length through Bore 7/8 in, Number of Set Screws 2