This bathroom copper sink has a standard 1.5 diameter hole at the bottom center and it does not have an overflow system. It is designed for above-the-counter mounting because its rim is rounded.This hammered bathroom copper sink is a beautiful piece of art.It has embossed braids all the way around 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 in use by the copper-smiths. The border is rounded, this allows to sit on your counter top.This copper sink was made from one sheet of copper, raised with the artist hammer, there are no welded joints, as a matter of fact, the braids were pulled out of the copper sheet itself.Hammering the red-hot copper is an ancient technique the copper-smiths still use, where no power toos are used, just the furnace to heat the copper and a hammer to give it the shape. We got this bathroom copper sink from the skilled copper-smiths from Santa Clara del Cobre, Mexico. 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. The copper sheet is 16 gauge (0.05" thickness).IMPORTANT NOTE: The patina can be damaged faster if toothpaste stays for long periods of time on the sink surface, because of this, washing it after brushing teeth is recommended."Hand-hammered and mold-cut to perfectionHandcrafted by Mexico''s Finest ArtisansWe include 1" long brown screws in all of our hammered copper switch plates