Air Spring 5518:Black 3090:Rubber 5563:0.1 3390:Regular 1838:11.8 2360:601 2602:10.5 30:No 3761:2 Package Contents:1 Air Suspension Spring The suspension air spring is an essential component of the vehicle's air suspension system. The air spring absorbs road shock and supports the vehicle. Dorman Air Suspension Springs are made from high-quality materials for increased durability and a longer service life. This direct replacement part prevents a sagging suspension and eliminates the possibility of damage to other suspension and undercarriage components. Additionally, the Dorman Air Suspension Spring restores proper ride height ensuring a smooth ride and directional stability.