Houzer PCG-3600 WH Porcela Series Porcelain Enamel Steel Undermount Single Bowl Kitchen Sink, Large, White Undermount Large Single Bowl. 3-1/2 inches Drain Opening External dimension 17.32 X 30.9 inches Bowl: 28.75 x 15.06 x 9 inches deep Non-porous glossy surface. Chip, crack and scratch resistant. Made of natural rubber, the Super-Silencer pad helps to reduce the noise of clattering dishes and running water NOTE: The edges and drain area are UNFINISHED - UNDERMOUNT sink, so the edges, back and drainhole area are NOT finished with porcelain - This is because those areas will be mounted with plumbers putty on the counter as well as the drain strainer so there is no reason to finish and polish the edges.