16 Gauge Premium T-304 Grade Stainless Steel (18/10 Chromium/Nickel) Will Never Rust Or StainDrop-In Topmount Installation. Cutout Template And Mounting Clips Included.Commercial Grade Brushed Finish - Easy To Clean And Long-Lasting. Unlike Satin, The Brushed-Finish Hides Scratches And Matches Well With Your Kitchen Appliances.Heavy Duty Sound Proof Coating And Thick Rubber Padding - Minimizes Noise And CondensationCurved Inside Corners And Sloped Bottom Ensures Perfect Water Drainage And Makes It Easy To Clean.Includes Decorative Drain Cover - Hides The Drain While Allowing Waste And Water To Flow Through Freely. Also Fits On Top Of Garbage Disposal Flange.Exterior Dimensions: 23-3/8" (Wide) X 20-5/8" (Front-To-Back)Interior Dimensions: 21" (Wide) X 16" (Front-To-Back)Bowl Depth: 9"Minimum Base Cabinet Size: 27"Standard 3.5" Drain Opening Will Fit Any Garbage Disposal Unit.