THESE ARE NOT THE PISTON SEALS. THEY SEAL THE CALIPER HALVES TO EACH OTHER. DO NOT BUY THEM UNLESS YOURS ARE LOST OR LEAKING.
These are the small 0.500" OD round seals that go between the caliper halves of the 3/S aluminum calipers. Made from heat resistant and brake fluid resistant rubber.
The price is per 1 seal.
1/2 gen front calipers and 2gen rear aluminum calipers use 2 seals per caliper.
1gen rear steel calipers do not use these seals.