Replace Part Number: VS-227, 53321-Q120,52321-Q120A Inlet Port: NPT1/4 Max Working Pressure: 1.2Mpa Mounting Hole Centre: 38mm Mounting Thread: 1/4-20UNC Fit for: All Hendrickson Suspension Applications, All 1980's Through Current Neway 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 Generate A Large Air Consumption. Neway suspensions have to be measured from the bottom of the frame to the center of the axle. This is because they have an 8 1/2 inch, 10 1/2 inch and 17 1/2 inch hanger height. Material: Metal colour: 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 the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.