Product Details: Update your semi to experience less vibration and component wear, with the Atro Air Leaf Bushing Kit that ensures you're Ready for the Road Ahead™. With a specialized design that nestles between moving and stationary elements, this suspension piece minimizes movement while decreasing mechanical wear-and-tear. Manufactured with heat-resistant polyurethane for boosted durability, increased life expectancy, and better vehicle control. FleetPride is your First Click in Heavy Duty®.