Replace Part Number: VS-227, 53321-Q120,52321-Q120A Inlet Port: NPT1/4 Max Working Pressure: 1.2 MPa Hole Center: 38mm Thread: 1/4-20UNC Fits: All Hendrickson Suspension Applications, All Neway Trailer Air Suspensions from the 1980s through current Trailer Air Suspensions, Most other Trailer Air Suspensions. Installation Recommendations: When not exceeding the maximum movement angle of 45°, The length ratio L/A should be less than = 1.2. The length L should be between 175 and 295 mm. If a shorter yaw is used, the height valve will generate significant air consumption. Neway suspensions will need to be measured from the bottom of the frame to the center of the axle. because a suspension height of 8 1/2 inches, 10 1/2 inches and 17 1/2 inches. Material: Metal color: black Package Contents: 2 set x Air Height Leveling Valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different