The Atro Polyurethane Radiator Mount Bushing is designed to provide consistent performance in the real-world operating environment. It is made of polyurethane, which is known for its superior durability and strength. The bushing has an O.D. of 1-1/8" and 7/8" for a perfect fit and easy installation. With this product, you can be sure that your Kenworth truck will be running smoothly and efficiently. FleetPride is your First Click in Heavy Duty®.