The new generation of adjustable proportioning valves combines the latest refinements to deliver precisepressure metering and strengthfrom a compact forged billet design. Pressure adjustments range from 100-1000 PSI and provide for a maximum decreaseof 57% in line pressure, the most of any available valve. Adjuster knob with fine threadtuning provides precise pressure adjustment. This adjustment lets you fine tune the front to rear braking balance by proportionally decreasing the rear brake linepressure. Valves weigh only 5.2 ounces and have two .25" side mounting holes spaced 1.00" apart. This valve varies from our standardKnob Style Proportioning valve, as the in and out portsare 3/8"-24 inverted flare seats and do not requiretube nut adapters to directly install 3/16 tubing with inverted flare 3/8"-24 nuts.