Smart Series™ Sink, undermount, 1-compartment, 20" wide x 20" front-to-back x 12" deep, 3-1/2" drain opening, 22-1/2" x 22-1/2" O.D. trim size, 18 gauge 304 stainless steel (NOT FOR USE WITH STANDARD TABLES) (can be used as undermount on non-stainless tops)