The Tilton lever type brake proportioning valve valve enable the driver to adjust the line pressure to the front or rear wheels. This allows the braking force to be tailored to the style of driving or track /road surface conditions. This lever type valve from Tilton fits in the brake line and allows for 7 different adjustments. Each adjustment is indicated with a positive location on the lever to allow precise adjustments, even while driving.Seven notched pre determined pressure positionsClearly labelled handleThe body is precision machined billet aluminumThe lightweight and compact body has 2 through holes to allow mounting onto a panel and has an option of either -3 AN (3/8 UNF) or M10 x 1 inlet and outlet ports. The -3 AN version is supplied with adaptors to accept 3/16 inverted flare copper brake pipe.