18 Inch Solid Copper Extra Large Square Bar/Prep Sink (Satin Nickel Finish) - this sink is made from solid copper with a stylish hand hammered texture. It measures 18 inches wide by 18 inches deep by 6 7/8 inches high. Its drain size diameter is 3 1/2 inches. This style of sink is shown in a Satin Nickel Finish and it comes in several other finishes. A matching drain plug is available (not included).