American Standard Reliant 31 x 20-Inch Stainless Steel Undermount Double-Bowl Kitchen Sink - AMS-18CR.9312000T

Two drains are in the box, part 9028000.075. Mounting hardware, the countertop cutout template, and instructions come with it too. What you still need to source is the faucet (an undermount sink has no deck holes, so the faucet mounts in the countertop), the tailpieces and P-trap, and the supply stops.

18-gauge stainless. That is the heavier end of what shows up in residential kitchen sinks, and it matters on an undermount because the bowls hang from the countertop with no rim support: thinner 20 or 22 gauge steel oil-cans and drums under a dropped pan. American Standard also lists this one as a residential product rather than a commercial one.

An undermount sink mounts to the underside of the counter, so it needs a solid-surface, quartz, granite, or other stone top with a finished, sealed cutout edge. Standard particleboard-core laminate leaves a raw exposed edge at the cutout and will swell. If the tops are laminate, specify a drop-in or top-mount sink instead of this one.

The sink weighs 21.42 pounds, so the sink itself is a one-person lift. The two-person part is holding it up flat against the underside of a stone top while the clips and adhesive set. Most installers rig a support board across the cabinet opening rather than adding a second body.

It is treated on both counts. Rubber sound pads (American Standard calls them SoundSecure+) are bonded to the bottom and the sides of the bowls, and a multi-layer sprayed insulation, StoneLock, covers the underside. The spray coating also cuts condensation on the sink bottom, which is what soaks the cabinet floor and the shelf paper in a humid kitchen.

Stainless steel is the only finish offered on this Reliant undermount, ordered as MPN 18CR.9312000T.075. There is no other color or coating variant to specify, so the finish decision is really about the faucet and the disposal flange you pair with it.