Elkay Lustertone LFR1515 Single Bowl Top Mount Stainless Steel Bar Sink REPAIRABLE FINISH: Finish is scratch resistant to heavy-duty use. Deep scratches are repairable. Lustrous grain reflects light evenly for high shine. DROP-IN INSTALLATION: Sink is designed for drop-in installation to make the sink a focal point of your room. 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. U-CHANNEL INSTALLATION: Mounting clips placed inside the channel before installation mean less time under the sink for an easier install. MADE IN THE USA: This Elkay product is proudly made in the USA. DRAIN OPENING: Sink drain opening measures 3-1/2".