Noritz RC3 3-Inch Diameter Rain Cap Stainless Steel Single Wall Venting Noritz Tankless Water Heater Vent Rain Cap, Single Wall, 3 In. Diameter, Stainless Steel Quick snap connection The product is manufactured in United States Unique gasket-tight seal Quick snap connection Superior design Easy connect Line up: 3-Inch, 4-Inch and 5-Inch