Blanco 440221 Diamond Silgranit Drop-In Equal Double-Bowl Sink (White). 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 bowl depths of 9-1/2". This model comes in a clean, White finish.