Air Lift LoadLifter 5000 air spring kits feature 2-ply reinforced commercial-grade bellows, which mount between the spring and frame. They can be inflated from 5 to 100 psi to level loads up to 5,000 lbs. on large pickups and vans, wreckers, ambulances, motor homes, and commercial trucks. LoadLifter 5000 kits include bellows, air lines, fittings, brackets, mounting hardware, and instructions. They're engineered for installation in about two hours. Order the spring helper kit designed for fitment with your make and model.