Hey gearheads, this little red valve is a game-changer for your drum brake setup! The X AUTOHAUX 10LB residual pressure valve maintains just the right amount of pressure in your brake lines to keep those drum brake springs from pulling everything back [Function] The 10 pounds residual pressure is used to hold pressure against the springs in the drum. Duty Automotive Grade Chrome Retainer and Black Thermoplastic Cap Specification:Material: MetalColor: RedTotal Size: 76x19mm / 2., 99x0., 75(L*D)Bolt Diameter: 8., 4mm / 0., 33(D)Package Includes:1 x Residual Pressure Valve Brake Pressure Valve For Drum Brakes Kartek Off-Road Red 10 PSI Drum Brake Pressure Residual Valve 1/8" NPT | Racegear WA Red Metal Brake Pressure Valve This 10 LB Check Valve is Anodized red and Has a Directional Arrow to Show Flow [Fitment] Fit for the end of the valve has a pipe thread that accepts the common 3/8-24 inverted flare Male Fittings. Product InformationEasy be installed at the Master cylinder/Proportioning Valve, so only one is needed for rear drum brakes. Brake Resdual Valve Locaton at ndana Houldng blog [Package Includes] 1pcs residual pressure valve