This is a PAIR of Custom Fabricated Heavy Duty Rear Wheel Bearing RETAINERS for Porsche 911 models 1969-1989. For all cars with torsion bar. Made from stainless steel and as pictured. They are 9.5 mm thick, bore 64.5 mm overall across 115.5 mm and 94.3 mm tall. These were fabricated by a Porsche tech to use on clients race cars. They will need a slight bit of machining so that they can fit over the hand brake backing plate lip (if you will be keeping hand brake) so it can sit flush (This note from a previous buyer of a set FYI). Visit My PORSCHE Store for more items. Thank you.