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The Karran Q-309 is a single-bowl quartz undermount vanity sink finished in black, sized to fit a minimum 24-inch vanity cabinet and designed to mount beneath laminate, solid surface, or granite countertops.
A black sink anchors a vanity the way a dark fixture or matte hardware does: it reads as a deliberate design choice rather than a default. Paired with white or light-toned countertops, it creates strong contrast. Against charcoal, slate, or dark wood vanity cabinets, it reads as a tonal match that keeps the whole assembly cohesive. The Q-309 brings that finish option to a compact single-bowl undermount, so the color works for a powder room refresh, a guest bath upgrade, or a primary bath where the look is driving the decision as much as the function.
The sink body is quartz composite, an engineered material that carries the density and solidity of stone in a consistent form. The black finish runs through the material rather than sitting on top of it as a coating, so chips and surface wear do not expose a different color underneath. The non-porous surface resists staining and keeps soap residue and water spots from setting in, which matters in a bathroom where the sink sees daily use and needs to stay looking clean between cleanings.
This sink is the right call for a single-sink vanity where the finish is doing real visual work. It suits bathrooms built around high-contrast or monochromatic palettes, and it fits naturally into modern, transitional, and industrial-leaning designs where matte black fixtures are part of the plan. The 20 by 14 inch footprint keeps it compact enough for smaller vanity runs, and because it is undermount, the installation path requires a countertop that can support undersurface bonding: laminate, solid surface, or granite. It is not ADA compliant as configured, so confirm clearance requirements when specifying for an accessibility application.
The minimum cabinet width required is 24 inches. The sink itself is 20 inches wide by 14 inches deep, so confirm that your vanity cabinet and countertop overhang leave enough bearing surface for the undermount installation.
It is designed for installation into laminate, solid surface, and granite countertops. Confirm with your fabricator that the countertop material and edge profile are suitable for an undermount bond before ordering.
Quartz composite carries its color throughout the material, so the black finish is not a surface coating that can chip or flake to reveal a different color underneath.
No. The Q-309 is not ADA compliant. If your project has accessibility clearance requirements, verify compliance with your project specifications before specifying this sink.
Choose the Q-309 when the finish is part of the design plan and the install calls for a clean, rimless bowl that disappears under the countertop and lets the black quartz surface do the work.
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