The component with the lowest price in the REAR BRAKE CALIPER schematic is the Screw(2wg).
The Rear Brake Caliper is made up of components including this Caliper Assy, Rear 2 which is the most expensive.
This schematic depicts all components used in the Tdr125 1996 4gw4 Belgium 264gw-300e1 Rear Brake Caliper partslist.