Customer got out of racing and had a massive inventory of new in the box parts that RBS bought out allowing the next buyer a chance to save some cash!!!
For a racer that looks to fab tanks RBS has these Pro-werks -16 AN female bungs that allow a racer to later install ORB fittings. Threads are 1-5/16 -12, 1.625" hex, 1.060" overall height with a 1.250" register to drop in the tank before welding begins.
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.