A sample from the products for the Rear Brake Caliper include: Pad Set,rr (nas), Guard,r*tnatural*, Piston,22 A, Pin,bolt.
The lowest price component in this Rear Brake Caliper parts-list fiche is the O-ring,2.5x1.5.
Of all the components used in this assembly the Caliper Sub Assy, is the most expensive.