A 31-1/2 Inch Stainless Steel Sink for Hard-Surface Countertops

The Karran U-6040L is an 18-gauge stainless steel undermount kitchen sink with two unequal bowls split 40/60, designed to install beneath granite, quartz, or solid surface countertops in a 36-inch or wider base cabinet.

Key Features

• 40/60 double-bowl layout gives you a smaller prep basin and a larger primary wash basin side by side.
• 18-gauge stainless steel construction throughout both bowls.
• Undermount installation into granite, quartz, or solid surface countertops.
• Equal bowl depth of 6-3/4 inches in both the small and large bowl.
• 3-1/2 inch drain openings to accept standard sink strainers in each bowl.
• Requires a minimum 36-inch base cabinet for proper fit and support.

Two Bowls, Two Jobs

A 40/60 split puts a smaller bowl on one side and a larger one on the other, which works well for kitchens where the sink does double duty. The large bowl handles the main wash load while the smaller bowl stays open for rinsing produce, draining pasta, or keeping a second task from backing up the primary basin. Both bowls share the same 6-3/4 inch depth, so neither side feels shallow when it matters.

Because it mounts under the countertop, there is no rim sitting on the surface. The counter runs flush to the bowl edge, which makes sweeping crumbs and water directly into the sink a simple motion and keeps cleanup from collecting at a seam.

Stainless Steel at 18 Gauge

At 18 gauge, the steel is thick enough to hold its shape under loaded pots and daily use without flexing noticeably. The stainless finish is consistent across both bowls and resists the kind of surface wear a main kitchen sink absorbs over time. The undermount profile keeps the material visible only inside the bowls, which lets the countertop surface and its edge detail take the visual lead in the kitchen.

Where This Sink Fits

This sink is at home in a primary kitchen installation where a hard-surface countertop, granite, quartz, or solid surface, is already part of the plan. It suits a remodel or new build where the countertop is being fabricated to spec, since an undermount requires the counter to be cut precisely to the bowl perimeter. Designers specifying a full kitchen package will find the 40/60 configuration useful in galley and L-shaped layouts where a dedicated prep side and a wash side both earn their space. Cabinet shops building around a 36-inch sink base have a confirmed fit spec to work from.

Common Questions

A Stainless Undermount Sink Built for Daily Kitchen Work

The U-6040L delivers a practical 40/60 split in an 18-gauge stainless body that mounts cleanly beneath a hard-surface countertop and keeps up with a busy kitchen.