Blanco 440215 Diamond Silgranit II Drop-In 1-3/4 Bowl Sink (Anthracite). This unique double-bowl sink perfectly combines beautiful styling with ultimate durability. This sink is constructed of 80-percent solid granite, and is heat-resistant up to 536-degrees. It's amazing surface is resistant to scratches, stains, and all household acids and alkali solutions. It features a larger bowl depth of 9-1/2", and a smaller bowl depth of 8". This model comes in a beautiful, Anthracite finish.