Blanco 440215 Diamond Double-Basin Drop-In or Undermount Granite Kitchen Sink, Anthracite 80% solid granite, silgranit material features the touch and feel of Natural stone Required outside cabinet is 33 inch Flat deck is ideal for both drop-in and under mount installations Bowl depths are 9-1/2 inch and 8 inch Limited lifetime warranty Overall: 33-Inch by 22-Inch Self Rimming or under mount installation Silgranit Left Bowl: 16-1/2-Inch by 18-5/8-Inch by 9-1/2-Inch; Right Bowl: 12-1/2-Inch x 16-13/16-Inch x 8-Inch Cutout size: 32 1/4-Inches x 21 1/4-Inches; Cutout corner radius: 5/8-Inches