Fitting has a six sided wrench hex to allow the racer to hold the coupler and tighten the fittings into the coupler with ease. Both sides are the same NPT size.
RBS had an engine builder customer retire and traded in a whole box of new unused parts giving the racer a chance at some great deals. Make sure these are correct for your application before purchasing.
RBS has three of these in stock so buy one or both and save!!!!!!!!! Fittings are sold each.
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.