410 A 30 Tooth Sprocket with the center machined so a left or right hand flange type freewheel will bolt in the center of the sprocket. We drilled the 5 holes for the 5 mm x .80 bolts.
We took a # 41 sprocket and milled down the teeth to make a 410 that will use 1/2" x 1/8" chain.
Zinc Plated after machining.
