Fitment: For Toyota Tundra 2007-2021 Fit most side mount fifth wheel hitch applications Fits 1/2-, 3/4-, and 1-ton pickups and vans with leaf springs Package Includes: 2x Air springs Air lines Schrader valve Mounting Bracket HardwareLoad Capacity: 5000 lbs up Placement: Rear Feature: Can deliver superior load-carrying capacity Can prevent body roll and bottoming out while towing heavy loads Keep proper ride height Replace your factory jounce bumper 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