Product updated on 2021-03-19, Air LiftAIR:52440, 4 inch Universal Air Spring Spacers / pair, Includes two 4-in. level spacers and hardware. Works with all LoadLifter 5000 series and LoadLifter 7500 XL kits, Air Lift universal air spring spacers are made with high-grade 1/4 inch steel and rated to handle more than 10 tons of force. Simply attach between the lower air spring bracket and the air spring.