This Pro Series rectangle fits in a 30" sink base and provides 90° corners for additional space and a fresh modern professional look. The bottom of the sink has channel grooves to divert water for proper drainage. Crafted from 304 16 gauge Stainless Steel . Nantucket Sinks are sprayed with insulation to reduce condensation. Rubber padding is added to the bottom and sides of the sink to reduce noise and vibration.