DUAL MOUNT: Versatile design allows the sink to be installed as a drop-in or undermount. 18-GAUGE STAINLESS STEEL: Highest quality 18-gauge thickness and Type 304 stainless steel for lasting durability, performance and lustrous beauty. QUIET: Sound-deadening pad(s) minimizes sound and vibration for a quieter time at the sink. DRAIN OPENING: Sink drain opening measures 3-1/2". CABINET SIZE: Minimum cabinet size for this sink is 21". Fully undercoated 18-Gauge stainless steel Single bowl sink Primary bowl depth: 7-Inch 0 faucet holes