Raybestos FRC12390 R-Line Replacement Remanufactured Rear Disc Brake Calipers are engineered to deliver safe, leak-free performance. Featuring OE-matched design and specifications, these remanufactured semi-loaded calipers include EPDM70 rubber components for superior heat resistance, performance and durability. Seals, boots, bleeder screws and o-rings are replaced to guarantee leak-free performance, and pre-lubricated guide pins are also included to help with installation. Raybestos works tirelessly to ensure their calipers are tested to the highest multinational industry standards to ensure you receive a high-quality product. The testing parameters include testing for extreme pressure, cyclic durability under extreme temperatures, piston retraction, fluid displacement and residual drag torque and rubber aging and degradation resistance.