【ROLLING LOBE AIR SPRING】Heavy duty rolling lobe air spring engineered for trailer air suspension systems requiring extended travel and consistent load support. 【ALUMINUM BASE CONSTRUCTION】Corrosion resistant aluminum base with parallel mounting alignment for durability in demanding commercial applications. 【LOAD CAPACITY】Rated at 7,000 lbs at 100 PSI and 5,500 lbs at 80 PSI for reliable suspension performance. 【DIMENSIONS & TRAVEL】Compressed height 9.4 inches, extended height 27.6 inches, maximum diameter 10.12 inches. 【MOUNTING CONFIGURATION】Bottom plate single bolt design with 2.25 inch center-to-center spacing and 10.31 inch diameter. Top plate 2 bolt design with 6.2 inch center-to-center spacing.