CNC machined and drilled sprocket
Lightweight steel. 
10mm Wide foot spreads the loads over a greater surface area than a straight single sprocket and will significantly reduce the risk of the sprocket biting into your alloy freehub splines.
5/64" Teeth fits 1-9 speed chains.
16,17 and 18T sizes.
Designed to work with Gusset 66C Campag SS convertor.