KOHLER K-5290-HCF-NA Undertone Preserve 31-1/4-Inch x 17-7/8-Inch Large Undermount Single-Bowl Kitchen Sink, Stainless Steel, , 36-inch minimum base cabinet width. Innovative Preserve sink resists scratching and withstands everyday wear and tear. SilentShield sound-absorption technology offers quieter performance. 9-inch depth. Includes bottom basin rack and installation hardware.