Product Details: The Bendix AD-IP Air Dryer Cartridge Bolt Kit is designed to help restore the air dryer's efficient performance. This kit is made of high-quality materials for superior durability and is manufactured to meet or exceed OEM specifications in form, fit and function. It is built to offer superior performance and reliability, making it an ideal choice for your air dryer maintenance needs. With this kit, you can be sure that your air dryer will be running at its best. FleetPride is your First Click in Heavy Duty®.