RollerChainSprocket 1/2in 12mm Single

Roller Chain Sprocket Bore Diameter 12 mm For Chain Pitch 1/2 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 12 mm Number of Teeth 10 Outside Diameter 1.95 in Pitch Diameter 45.08 mm Bore Type Fixed Chain Number 08B Finish Black Oxide Includes Set Screws Keyway Yes Keyway Width 4 mm Length through Bore 25 mm Number of Set Screws 2 Set Screw Location One Setscrew Over the Keyway and A Second Setscrew at 90 Degrees Set Screw Size 4 mm