Granite Composite single bowl kitchen sink with a durable finish that is easy to clean. It has a deep bowl to maximize workspace and functionality with the beauty and strength of granite yet lighter weight. The insulated construction absorbs waste disposal noise and resists stain, rust, oxidation, chipping, and scratches. It is designed for Drop-in quick and easy installation. No mounting clips required for Drop-in installation. Plumbers putty for drains and silicone sealant for perimeter of sink is all that's needed. All Mont Blanc brand sinks are certified by the National Association of Home Builders Research Center and carry a Lifetime Warranty.