The bathroom copper sink you are looking at has a standard 1.5 diameter hole and it does not have an overflow system. This hammered bathroom copper sink is a beautiful piece of art. It is designed for over-the-counter mounting because its rim is rounded. It has six grape bundles evenly distributed along the central part of it, details can be observed in the pictures.From a copper sheet the wise artisan hands transform it into this unique piece. The hammer footprint is very visible. The reddish/oxidized texture is characteristic of natural copper when it is cooled down from red-hot temperature using cold water, technique that the copper smiths use. The border is rounded.This copper sink was made from one sheet of copper, raised with the artist hammer, there are no one welded joints, the grapes are pulled out of the copper sheet itself.The finish is in a dark brownish color. Suitable for your bathroom, it will add a unique home accent making it a very special point of attraction in your bathroom.This copper sink will not rust or become greenish because the patina will protect it from humidity and oxidation. The copper sheet is 16 gauge (0.05" thickness)."