Made of strong 20 ounce copper. Sandblasted flashing for great waterproofing membrane adhesion. Seamless flashing and drain basin. Comes with strong plastic dome strainer. 2", 3", 4", and 6" outlet sizes available. Copper outperforms the competition because copper does not rust and does not melt.Area roof drain20 ounce copper, 10" diameter seamless basinSandblasted 20 oz. copper flashing for excellent membrane adhesion2", 3", 4", or 6" bronze fittingPlastic dome strainerManufactured in the USA by Thunderbird ProductsNote on Fittings: Two types of fittings are available. A threaded adapter fitting is used primarily with 2" PVC pipe applications. The threads on the bronze fittings are male and can be attached to a threaded female PVC adapter. A no-hub fitting is the standard fitting used in the industry. With this fitting a rubber coupling is used to connect the drain to the drainage pipe.