Kraus KGD-430B 33 1/2 inch Dual Mount 60/40 Double Bowl Black Onyx Granite Kitchen Sink PREMIUM GRANITE COMPOSITE: Ultra-durable material made from 80% natural quartz for the look and feel of real stone RICH NON-FADING COLOR: UV-stable material offers a rich and consistent hue that will not discolor over time INSTALL AS UNDERMOUNT OR DROP-IN SINK: Versatile dualmount design is compatible with a range of countertop configurations and materials SUPERIOR CLEANABILITY: Naturally hygienic non-porous material is highly resistant to dirt and grime, easily wipes clean