Features: 1.High Strength: The compact and lightweight forged aluminum billet construction makes the proportional valve strong, rustproof and durable. 2.Pressure Adjustment Range: The proportional valve has a pressure adjustment range of 100?1000 PSI, maximum decrease of 57% in line pressure. 3.Purpose: Fine tune front and rear brake balance with an adjustment that allows you to proportionally decrease rear brake line pressure. 4.Important Proportional Valves: Proportional valves are often required when upgrading to a rear disc brake or larger front brake. 5.Necessary Tools: Universal brake proportional valve is a must have tool for all racing, drifting, rallying and track day vehicles. Specification: Item Type: Brake Proportioning Valve_x000D_ Material: Billet Aluminum_x000D_ Pressure Adjustment Range: 100-1000PSI_x000D_ Connector Size: 1/8NPT_x000D_ Applicable Models: Universal for car modification