33.0-in. x 20.0-in. White Fireclay Single Bowl Apron Front Kitchen Sink. The perfect blend of nature and design, Franke apron-front fireclay sinks are made of liquid ceramic which is then fired to create a material that feels incomparably smooth and is tremendously hard-wearing. The Franke Farm House collection will compliment a classic or modern design, and the 9" deep bowls provide ample space for any kitchen task.