Cool Gray Tone and an Asymmetric Bowl Split That Fits Real Kitchen Work

This Karran undermount kitchen sink pairs a warm-neutral gray quartz-composite body with a 60/40 double-bowl layout, putting the larger bowl where prep and washing happen and a shallower secondary bowl within reach for rinsing or a second task.

Key Features

• 60/40 double-bowl layout with a deeper large bowl (10 inches) and a shallower small bowl (7-1/2 inches) for separating heavy wash and rinse duties.
• Quartz-composite construction in a gray finish that blends with both warm and cool kitchen palettes.
• Undermount installation into granite, quartz, or solid surface countertops, bringing the counter surface flush to the basin edge.
• cUPC and IAPMO certified for plumbing code compliance in the US and Canada.
• Requires a minimum 36-inch cabinet for proper installation.
• 3-1/2 inch drain opening in each bowl, compatible with standard strainer and disposal fittings.

Two Bowls, Two Depths, One Continuous Workflow

The 60/40 split gives you an intentional size difference rather than two identical bowls fighting for the same job. The large bowl at 18 inches long and 10 inches deep handles a stockpot, a full rack of dishes, or a pile of produce without crowding. The smaller bowl, at 15-1/4 inches long and 7-1/2 inches deep, is the right scale for rinsing, defrosting, or keeping a colander in place while the main bowl stays clear. That depth difference is also useful when one cook is washing and another is prepping at the same counter.

Gray Quartz Composite That Works With the Counter, Not Against It

The sink body is quartz composite, an engineered material made from quartz bound in resin. Gray reads as a neutral between the warmer tones of wood cabinetry and the cooler tones of concrete or white countertops, which makes this finish a low-friction choice for kitchens that mix materials. Because it is an undermount, none of the sink rim is visible after installation. The counter surface runs to the bowl edge, so the gray of the sink meets the counter color without a visible lip between them.

Where This Sink Fits Best

This sink is a strong match for a main kitchen installation where the primary cook wants two bowls of meaningfully different sizes, not just two identical basins. A 36-inch base cabinet is the minimum, which is a common kitchen cabinet width, so it fits most standard sink runs without a custom cabinet. It installs into granite, quartz, and solid surface countertops, making it a natural pairing for kitchens where the countertop is already one of those materials. Designers specifying for a transitional kitchen palette will find the gray finish less committal than black or white, sitting comfortably next to a range of cabinet and countertop combinations. Contractors and cabinet shops working on new builds or full remodels can plan it into any layout where a 36-inch undermount position is already drawn.

Common Questions

A Gray Undermount Sink That Earns Its Place in a Working Kitchen

The QU-630-GR brings a practical bowl split, a finish that coordinates without calling attention to itself, and certified plumbing compliance into a single undermount package sized for a standard 36-inch cabinet run.