Handle big loads with full-time support. Our heaviest system for big loads or full-time load support. For full-size RVs, trucks and vans. Rated up to 5000 lbs. of load support. Attaches to leaf spring suspension to improve ride and handling and solve poor suspension problems. Individual inflation valves allow you to adjust ride height from side to side and front to rear. Customize spring rate for different road and load conditions. Set of two. Fits the following Motorhomes:'93-'96 GP-30 Cutaway Chassis'93-'98 P-30/32 Class A Motorhome (Under 14, 500 GVWR)'63-'92 P-30/32 Class A Motorhome Fits many 3/4 ton & 1 ton pickups & vans | Air Lift Super Duty Air Springs, Rear '63-'92 Chevy P-30/32, 93-'98 Chevy P-30/32 Under 14,500 GVWR