Firestone Reversible Sleeve Air Spring, 6.50 X 6.90, Truck Part No. W01-358-5702 Firestone W01-358-5702 W01-358-5702, Firestone Reversible Sleeve Air Spring, Firestone Air Bag 5702 6.50 inches x 6.90 inches 2 Year / 200,000 Mile Warranty Aluminum