Brake Proportion Valve Adjustable Fit For Car Prop Brake Proportion Valve Enhance your vehicle's braking system with this adjustable valve knob, allowing you to customize your driving experience. Improve safety and control on the road by adjusting the brake bias to suit your specific driving conditions. Through preventing fluid from flowing back to the master cylinder, the cylinder oil separator breather valve retains a small amount of pressure within the pipeline. Produced using robust plastic, it resists corrosion and damage, ensuring a prolonged service life., Manufacturer: GAYCLG