Check out any of the eighteen Rear Caliper components enlisted.
Parts such as the Rear Caliper: Packing,piston Seal (nas), Cap-breather, Piston-comp-brake, Disc,rr are included in the Kdx125-a4 Kdx125sr 1993 Europe Nr Rear Caliper parts fiche.
The most expensive part in this assembly is the Caliper-assy,rr.