Fits 4-71 thru 18-71 roots and screw superchargers. Pulley is hard anodized for wear resistance and corrosion protection. Pulley has had a .500" of the teeth machined off to clear a blower belt guard bolt. Pulley will still allow the racer to run a 65 or 75mm blower belt with no issues.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.