The copper sheet gauge on this copper bowl changes depending on the part of the sink where is measured: The upper edge is 0.152 thick, the middle of the sink is gauge 8 (0.12") and the bottom part is gauge 15 (0.056"), making it a very heavy piece. This bathroom copper sink has a standard 1.5" diameter hole and it does not have an overflow system. It is intended to be mounted above the counter, no border around it, except a bold edge, technique used by the copper-smiths on the copper sheet border to make appear trickier than actually it is. The result is a beautiful vessel, that when seen from above if shows a thick copper edge, giving a strong body to the sink! The finish is terra, showing a smooth brownish copper color. It will definitely add a unique accent to your bathroom making it a very special point of attraction for you and your visitors."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