Product Details: The Hendrickson 15" Ride Height Air Spring Plastic Spacer is designed to provide additional support and stability to air spring assemblies. This spacer is made from a highly durable and resistant plastic material that is able to withstand wear and tear, as well as corrosion and damage from harsh environments. It is easy to install and can help to extend the lifespan of your air spring assembly. FleetPride is your First Click in Heavy Duty®.