Neoroc Sink: 15.5-inch Cairn Sink is made of KOHLER Neoroc composite that is easy to clean, heat resistant up to 750-degrees F, and resistant to scratches, stains, chipping and thermal shock; this sink features a matte finish for rich, dimensional color, Matte Grey Single Bowl Kitchen Sink with Accessories: The 9.5-inch-depth bowl provides generous workspace; includes a bottom sink rack, cutout templates and installation clips for an easy one-person, single-day project Single-Mount Sink: Cairn Sink can be installed as an undermount sink (installed below your countertop) with no faucet holes; use this versatile Cairn Sink as a bar sink, RV sink or as an outdoor kitchen sink. Additional Hardware for Neoroc Kitchen Sink Use: K-8801 Sink Drain and Strainer With Tailpiece, K-8799 Sink Drain and Strainer Basket, K-23726 Drain Treatment, and K-23730 Neoroc Cleaner Minimum Base Cabinet Width: 18" (457 mm)