Air Lift Dominator 2500lb Air Bags (2 Pack) The Dominator D2500 features an unprecedented maximum restrained pressure of 600 psi, 7.7" usable stroke, and a load range of 294-2096 lbs. This bad boy will give you the performance you crave. With more lift, a softer, smoother ride, and the lowest price in the industry; you can't go wrong with the new Dominator D2500. Single 1/2" Port, Max Length 10.5", Collapsed Length 2.8", Max PSI 600, Max Diameter 7", Collapse Force 75 lbs. Includes: 2 Air Bags (Springs)