This kitchen copper sink has a standard 3.5 diameter hole with a single bowl. The upper border is 2.5" all the way around it. The inside bowl measures 28" length by 17" wide by 10" deep. This hammered kitchen copper sink is a beautiful piece of art. From a copper sheet the wise artisan hands transform it into this unique piece. The hammer footprint is very visible, giving it its own character. The reddish/oxidized texture is characteristic of natural copper when it is cooled down from red-hot temperature using cold water, that specific characteristic is what makes it so beautiful.The techniques used by Mexican coppersmiths is the same one used for several centuries, where no power tools are used, just the furnace to heat the copper and a hammer to give it the shape. The finish is in a dark brownish color. Along your home decoration, this piece it will add a unique touch to your kitchen making it a focal point.The patina can be damaged faster if any abrasive substances stay for long periods of time on the sink surface, because of this, washing it after usage is recommended; besides that, no more maintenance is required. The copper sheet is 14 gauge (0.064" thickness)."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