Teeth are HTD profile. Fits 4-71 thru 18-71 roots and screw superchargers. The bore has been sanded and measures 2.010". One bolt hole has been elongated with a die grinder to mount on a crank hub with one offset bolt hole. The job was not done very clean but it is functional.
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.