Product Details: The Monroe Shocks & Struts Shock Absorber is designed to provide superior durability and force absorption for semi-truck suspension parts. It is constructed with a resistance weld and an additional 360° weld for maximum strength and durability. The shock absorber is nitrogen gas-charged to reduce aeration and maintain tire to road contact. It also features 10-stage valving that reacts to a wide range of driving conditions, providing more efficient and consistent control. FleetPride is your First Click in Heavy Duty®.