Decor Star P-007-B2 31 1/2 Inch Undermount 70/30 Offset Double Bowl 18 Gauge Stainless Steel Kitchen Sink cUPC, Grid, and Strainer Combo Corrosion & stains resistant 18-gauge premium grade t-304 stainless steel construction Scratch-resistant premium satin finish. Sound dampening pads & undercoated insulation for noise reduction Bottom Grids, Strainer, Mounting hardware, installation guide & template included UPC, cUPC Certified Limited Lifetime Manufacturer Warranty w/ US Based Customer Service.