43NH90 Thunderbird Products 3 in Bowl Deck DrainCopper bowl deck drain is designed to be used with thin membrane systems. Sandblasted 16 oz. copper flashing provides great adhesion to your waterproofing membrane. Comes standard with a 4 in round bronze grate or 5 in round nickel bronze grate. Available with 2 in or 3 in outlet. Bowl deck drain for thin membrane systems For use with thin membrane systems 16 ounce copper flashing Available with 2 in or 3 in outlets Available with 4 in round bronze grate or 5 in round nickel bronze grate Manufactured in the USA by Thunderbird Products