Single Strand Sprocket For Bushing Size SK For Bushing Type Quick Detachable For Chain Pitch 5/8 in Material Steel Number of Teeth 54 Outside Diameter 11.11 in Pitch Diameter 10.749 in Chain Number 50 For Number of Strands Single Maximum Bore Diameter 2 5/8 in Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 3 7/8 in Hub Projection 0.907 in Hub Type One Side Length through Bore 1 1/4 in Material Grade 1045 Minimum Bore Diameter 2 5/8 in