Nantucket Sinks Glacierstone apron sink is a patented design to retrofit over a standard base cabinet. Large single bowl is roomy and easy maintenance in a modern material! Bottom grid and drain are included with the sink. The sink itself is solid throughout allowing you to buff out any scrapes or scratches with the included pads. Heat resistant to 500 degrees Fahrenheit. You'll also be aided by the included colander drain with its own colander basket for collecting more food scraps than your typical basket strainer. Composite material is sound absorbing and stain-resistant, non-porous surface is hygienic. Features a 15 year warranty against discoloration.