304-grade cold-rolled stainless steel is used to make this 32 X 18 Inch, Undermount Double Bowl Rounded Kitchen Sink. It has rounded corners and a polished satin finish, which adds luster and hides small scratches that can appear over time. The undermount sink has thick sound-dampening pads and an insulation layer on the underside to minimize noise and moisture. For as long as you own the sink, it is covered by a limited lifetime warranty. This sink has earned UPC certification. This sink is highly durable and long-lasting. It has a very low maintenance cost.