The Hendrickson Rear Spring Assembly is the perfect solution for heavy-duty truck and trailer suspensions. Made of high-quality materials, this assembly is designed to withstand heavy loads and harsh environments. The durable rubber bladder and strong outer shell ensure that this assembly will last. It includes a built-in air chamber that can be adjusted to provide the desired level of stiffness. This feature allows for a customized ride that meets the specific needs of your vehicle. Installation and maintenance is easy and hassle-free. Overall, it is a reliable and high-quality product that is compatible with most heavy-duty truck and trailer suspensions. Its durable construction, adjustable air chamber, and easy installation make it the perfect choice for anyone looking for a reliable and long-lasting suspension solution. FleetPride is your First Click in Heavy Duty®.