Felpro 55002 rear axle flange gaskets. Didn't fit my 1966 Buick Wildcat convertible with the 10 bolt axle with the square bolt pattern. It was an odd year and often the parts catalogs are wrong. Couldn't return them so I'm selling them. One package is opened but unused and the gasket is clean. Check the shipping options. I can send via a letter and stamp but with no tracking. I also have priority mail as an option.