Just what I ordered and installed perfectly.

As advertised. Nice fit and seal properly.

Great improvement over rubber o-rings.

good product

Worked great

Great service

Great O rings fit perfect

Fast and no problems

As ordered, and fast delivery. Thank you for reasonable pricing of such small orders.

Nice quality, good tight fit, should hold up longer in the Phoenix heat and dry weather.

Did the trick!

Small but mighty! Good quality O rings!

These O rings fit and performed perfectly on the sump drain of my Kiowa helicopter.

Quality material, and a good price.

These are o-rings. The -12 are the ones used on Scott fuel valves in some Senecas, Aztecs, and Seminoles. The maintenance manual says to lube them with stop lock grease, which is a made up term that no one is familiar with. The correct grease is DuPont Krytox 240AC, which is very expensive. Dont use anything else though, since the o-rings have to slide on every flight (if the checklist is followed), and failure of these o-rings could cause the fuel selector to get stuck on off, or crossfeed into the other tank. Kinda important. If the selector valve is hard to move, or you notice fuel cross feeding into opposite tank while parked, then these valves need overhaul. Takes forever to remove and reinstall.