The Volvo and Mack D11, D13, and D16 Diesel Particulate Filter is a high-quality product designed to fit most Volvo and Mack models. With a diameter of 14.256 inches and a height of 13.346 inches, this filter is made of silicon carbide substrate material and stainless steel canister construction material. It features a flanged inlet and outlet and comes with two gaskets and two clamps. This filter is sold individually and is not CARB compliant, making it ideal for those outside of California. With OEM and aftermarket numbers including 21905394, 0621938, and 20864127, this filter is a practical and reliable choice for diesel engines.