Well, this is the only thing standing between me and driving my car. I put all the new calipers I got on the car, but the remanufactured driver rear caliper was completely missing the outer adjusting screw seals, so when I tried to bleed the brakes, the fluid just poured out of the calipers. I have a rear caliper rebuild kit from Pelican Parts, but I can't figure out which one is the adjusting screw seal, or even if it is in my kit.

Can anyone tell me which one is the outer adjusting screw o-ring, and what the other o-rings are used for? Also, exactly where would each of these go?

Left to right: 4mm ID 9mm OD 2mm thickness, another one of the same, 6mm ID 8mm OD, 11mm ID 15mm OD

Missed the similar post 10 posts below.. Sorry for not using Search.

When you say the seal is square, do you mean square in shape, or just square in cross section (like the two seals in the picture)

Did some research on PP's boards, and it seems like the 2 square cross section seals are actually for the caliper half seals, and the small circular one is the outer adjusting screw(wheel side), and the large circular one is the inner adjusting screw (e-brake side)

Would I be right in this assumption?