This undermount Pro Series rectangle sink provides Small Radius corners for additional space and a fresh modern industrial look. The bottom of the sink has channel grooves to divert water for proper drainage. Crafted from 304 16 gauge Stainless Steel satin finish. 3.5"" drain opening. Nantucket Sinks are sprayed with a special insulation to reduce condensation. Rubber padding is applied for noise reduction. *Grids available for almost all sink bowls, some exceptions exist*