Fitment: For Ford For Ford F-250 4WD RWD 1999-2004 For Ford F-350 4WD RWD 1999-2004 For Ford F-250 Base Model 1999 For Ford F-250 Super Cab 4WD RWD 1999 For Ford F-250 for Ranch 4WD RWD 2005-2007 For Ford F-250 Lariat 4WD RWD 2005-2007 For Ford F-250 XL 4WD RWD 2005-2007 For Ford F-250 XLT 4WD RWD 2005-2007 For FordF-350 for Ranch 4WD RWD 2005-2007 For Ford F-350 Lariat 4WD RWD 2005-2007 For Ford F-350 XL 4WD RWD 2005-2007 For Ford F-350 XLT 4WD RWD 2005-2007 Only work on trucks equipped with for BW Hitch 1105 or 1199R in the 49 in. position. Fit many 3/4 ton and 1 ton pickups or vans Package Includes: 2x Air springs Air lines Schrader valve Mounting Bracket Capacity: up to 5,000 lbs Spring Type：Leaf Placement: Rear Feature: Keep proper ride height Reduce bouncing at the rear of vehicle when towing Stop vehicle’s main springs from sagging (due to constant load compression) When towing / hauling heavy loads,air springs raise safety /comfort working with your suspension Two adjustable secondary air helper springs can add up to 5,000 pounds of leveling capacity per axle for vehicles with leaf springs1.Notice：California Prop 65 Warning 2.Code: MXR02FXSY 3.Authority ID：MXR02FXSY