Roller Chain Sprocket Bore Diameter 1 in For Chain Pitch 1 1/4 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 2 1/4 in Number of Teeth 11 Outside Diameter 5.01 in Pitch Diameter 4.438 in Bore Type Plain Chain Number 100 Finish Black Oxide Hub Diameter 3 9/16 in Hub Projection 1.183 in Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 1 7/8 in Number of Set Screws 0 Set Screw Location Not Applicable