Set of hydraulic brake seals (cups) — medium, 2 pcs. The seals seal the pistons in the brake master cylinder and caliper and prevent brake fluid from leaking out.
Replace them if there are fluid leaks, a "soft" brake lever, or if the brake does not release. The size of the seals (large, medium, small) is chosen by the piston diameter, so compare them with the old ones. Pads are replaced as a set for one wheel; bedding in a new set takes several dozen kilometers of gentle riding.
