Used 13.9mm-30 tooth blower pulley. This pulley is 3.50" wide and has a 2.00" register made from billet aluminum with six .375" bolt holes on a 2.782" bolt circle. Fits 4-71 thru 18-71 roots superchargers. Pulley has one offset bolt hole for older crank hub or blower snouts.
Teeth have a few dings on them but pulley has lots of life left in it. Buyer can click on second picture to see pulley teeth.