WHITEHAUS 20″ Noah’s Collection Brushed Stainless Steel Commercial Single Bowl Undermount Sink - WHNCM201520" Noah's Collection Commercial Series stainless steel single undermount sink with 3 1 2" drain opening. This brushed, scratch resistant commercial grade stainless steel sink is constructed from 16 gauge 304 grade stainless steel with 18 8 chrome nickel ratio. The benefit of this quality stainless steel ensures them to be scratch, stain and chip resistant, making it one of the most durable sinks on the market. It is equipped with zero radius corners