Enhance your heavy-duty truck or trailer's suspension with the TORQUE PARTS TR7818 air bag, a durable triple convoluted air spring. It's a high-quality, aftermarket replacement for numerous part numbers, including Hendrickson 13041 and Firestone W01-358-7818. This air bag is engineered with robust, thicker rubber and is backed by a 3-year warranty, ensuring a long and reliable service life.