Feature●[Function] This Residual Pressure valve is to prevent fluid from returning to the master cylinder and keep a small amount of pressure in the line.●[Function] Needed when brake calipers are higher than the master cylinder.●[Size] 63x19mm / 2.48"x0.75". Made of Metal. Duty Automotive Grade Chrome Retainer and Black Thermoplastic Cap●[Easy Installed] Easy to be installed, direct replacement to your old or broken one.●[Package includes] 1pcs residual pressure valve,easy to install.Description