Allstar ALL48025 Brake Proportioning Valve Proportioning valves allows adjustment of front-to-rear brake bias with a simple twist of the knob Valve provides up to 57 percent reduction and has fitting ports that are 1/8 npt Valve also includes two fittings to adapt to 3/16 inch brake line Dimensions are 1 inch long x 1-3/4 inch wide and 3-5/16 inch tall Sold each