The residual check valves is 10 psi residual pressure valve. The reference number is RPV-10 & Wilwood# 260-13784. Our HBS# AU0006-004 residual valve has brass fittings which size is 3/8-24". The finish of this valve is pink anodized. It is only needed for rear drum brakes to control the brake pressure, which has the brake master cylinder & brake proportioning valve.
