This Dorman Oil Separator Gasket is designed for Ram Truck 2500, Dodge 3500, 4500, and 5500 models from 2009 to 2021. The gasket is made of silicone material with a thickness of 0.27 inches. It is a replacement part with lifetime warranty, and its manufacturer part number is 918-369. The gasket is sold as a single unit and is suitable for exhaust and emission systems.