American Standard Portsmouth 16 x 16-Inch Stainless Steel Undermount Round Single-Bowl Kitchen Sink - AMS-18SB.7001600S

At 16 inches round and 7 inches deep, this is a prep or bar bowl in most kitchens, not a primary wash-up sink. Round bowls of this diameter will not lay a sheet pan or a large skillet flat. Where it earns its place is on an island or a beverage station beside a full main sink, or in a small apartment kitchen where the run is short. If it is going to be the only sink in a rental unit that sees real cooking, step up to a larger rectangular single bowl instead.

Undermount sinks need a solid-surface top with a sealed, polished edge on the cutout, which means granite, quartz, marble, or solid surface. Laminate and most standard tile tops will wick water at the exposed core once you undermount into them. If the counter is laminate, you want a drop-in or top-mount bowl, not this one.

Drain and strainer are included in the box. What is not included is the tailpiece, trap, and any garbage disposal flange, so budget those separately along with silicone and the mounting clips your fabricator uses. There is no faucet hole in an undermount bowl, so the faucet mounts through the countertop or the backsplash and has to be specified on its own.

American Standard treats this bowl on two fronts. SoundSecure+ puts rubber pads on the bottom and the sides of the underside to kill vibration, and StoneLock adds a multi-layer sprayed insulation over the underside. The spray coating also cuts condensation on the outside of the bowl, which matters if the cabinet below holds anything you would rather keep dry.

Stainless steel is the only finish, ordered under part number 18SB.7001600S.075. There is no separate satin or mirror option to specify, so anyone standardizing several units across a building gets a consistent bowl on every order.