Features ; 1. The release valve will help with the release and maintenance of hydraulic brakes. ; 2. The unique check valve allows fluid and air to be discharged while preventing air from re entering the system ; 3. Connect the provided hose to the brake joint and then to the deflation tool. Then open the release valve and pump the lever. The valve will prevent air from re entering the release valve and complete the brake release on its own ; 4. Easy installation and seismic and impact resistance: The design of brake hoses considers the requirements of easy installation, seismic and impact resistance. Even when encountering bumps and vibrations during vehicle operation, the brake hose can still function normally, ensuring the stable operation of the braking system ; Specification ; ; Materials: Aluminum and Rubber ; Total length of hose: 500mm ; Valve length: 53 millimeters ; Inlet hose: inner diameter 4mm, outer diameter 6mm, length 150mm ; Export hose: inner diameter 5mm, outer diameter 8mm, length 350mm ; Package Include: ; ; 1 * Brake deflation tool kit