Ripped as I was trying to get it on. Glued it up and now it works fine.
This gasket does a perfect job of keeping gas from sloshing past my original 68 standard gas cap and you only need one. The gasket you'd need two of is the filler pipe cork gasket to keep the gas cap from rubbing on the paint.
I purchased 2 of these gaskets after freshly painting my car. This pushed the Gas Cap out far enough that so I would stratch the paint twisting on the gas cap.
this now keeps my gas cap tightly on which means no rattle, scratching and keeps fumes in