New 72 tooth #35 chain zinc plated sprocket. Sprocket had 6 mounting holes drilled for 5/16" bolts and on 1-5/8" centers. Center hole if drilled for 1-3/8 bearing so everything lines up on back wheel. This sprocket works on Thomas, Manco, Bonanza and any wheel with the same hole pattern. Overall height is 8-3/4". Install on your everyday rider or restoration.