Product Details: The Monroe Shocks & Struts Shock Absorber is designed to provide superior durability and force absorption to protect semi-truck suspension parts from vibration damages and minimize wear and tear. The shock is resistance welded with an additional 360° weld for high tensile strength and maximum durability. It offers more efficient and consistent control in applications and is a nitrogen gas-charged to maintain tire to road contact by reducing aeration. FleetPride is your First Click in Heavy Duty®.