Glacier Bay Fireclay farmhouse sinks are made from fine fireclay and ship with an matching bottom grid. Sinks are made from organic materials using high-tech casting methods and feature solid wall construction for added strength that makes each sink compatible with standard size flanges and strainers. Designed to resist stains, chips, scratches or cracks, these fireclay sinks are made to hold up to the wear-and-tear of a busy kitchen. As an added bonus they are heat resistant (up to 2000°F).