Vitreous china is a clay menium that is fired at an intense heat to create an attractive, yet extremely hard, non-porous, glass-like surface. You can count on Ortega Kitchen and Bath to provide high quality sinks that will provide years of outstanding beauty, as well as exceptional quality to last the test of time. Our Vitreous China Sinks have a 1 1/2" drain hole and are available in black, white and ivory (unless otherwise noted).