Our original product, a rubber air spring inserted into a car's factory coil spring, was created and patented in 1950.
Pipe plug;3/8 NPT;Hex head;Sold individually;California Residents: WARNING AirLift Accessories Pipe Plugs 3/8" NPT (hex head) - 21737 Our extensive product line offers air helper springs for trucks, RVs, SUVs, CUVs and vans, and the most technologically advanced on-board air compressor systems for on-the-go air spring control. We've come a long way since 1949 and are proud to be a dedicated suspension specialist company.Air Lift Company has developed dependable air spring suspension products since our inception in 1949.