Used 13.9mm-41 tooth blower pulley. This pulley is 3.375" wide and has a 2.00" register with six .375" bolts on a 2.782" bolt circle made from billet aluminum. Fits 4-71 thru 18-71 roots superchargers. The back 1/8 inch of the teeth have rubbed something at one point in the pulleys life.
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.