Made from billet alum. to help keep the hot rod light and anodized for corrosion and galling protection. The first number is the male pipe thread and the second number is the female pipe thread. Wrench hex is .940".
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.