[T304 Nano Stainless Steel 16G construction] This 30 inch Gunmetal Black Undermount Sink is constructed of 16 Gauge T-304 Grade Stainless Steel for superior strength and durability.The colored finish is applied as an outer layer using an innovative nano technique that makes it incredibly tough and resistant to wearing or peeling.[Drain Easily, Sound Proof] The X-shaped water guide allows the water to flow down more smoothly, making the sink easier to clean and maintain its beauty.[Coating and Silencer Pad] There is a thick coating on the outside of the sink to prevent condensation caused by weather changes. In addition, the 3mm thick rubber silencer pad can greatly reduce the noise from the faucet and give you a quieter cooking environment.[Dimensions] Exterior Dimensions: 28" x 18" x 9" (Minimum Recommended cabinet size: 31 inches). Interior Dimensions: 26" x 16" . Standard 3-1/2" drain opening fits most common garbage disposals. Recommended Cutout Size: 26 x 16 inches.[Included in the Package] Comes with this kitchen sink: 1 x 304 stainless steel dish grid, 1 x drain assembly, 1 x drying rack,1 x pack clips, 1 x cutout template and installation instruction.