Undermount Kitchen Sink. 18 Gauge Stainless Steel. 70/30 Double Bowl. Dimensions 31-1/2" x 20-1/2" x 9" | 7".Product Features:- Crafted from laboratory certified 18 gauge 304 stainless steel. - Fully Protected by heavy duty sound deadening pads and coating. - Brushed satin finish deck and bowl.-Standard size drain of 3.5 (Strainer/drain sold separately)Dimensions:31-1/2" x 20-1/2" (Exterior); 17-5/8" x 18-1/2" x 9" (Left Bowl Interior); 10-1/2" x 16" x 7" (Right Bowl Interior);