Engineered with Heat-Flowed cast iron to give our wheel cylinders the ideal balance between tensile strength and hardness, Anodized coating provides complete 360º protection against rust, moisture and oxidation, Reinforced pistons (FeSi) feature higher tolerance to pressure and increased wear resistance, PCRVi (Pressure Conscious Reducing Valve integrated) reduces pressure buildup, Trivalent-coated bleeder screws provide extra protection and added durability, Premium ProSeal™ Nitrile Rubber (NBR) cups and boots for long lasting performance, Wheel cylinder bores are surface tested to ensure an optimum sealing surface for the pressure cups, Part Reference Numbers : 34195 34196 WC250900 WC257810 W610043 58330-25000 58330-2D000 58330-2D020 58330-2H000 58330-38010 58380-25000 58380-2D000 58380-2D020 58380-2H000 58380-38010 WC370108 WC370109 WC134581 WC134582, Kit Includes: 2x Rear Drum Brake Wheel Cylinder (Both Side)