The KOHLER® Billings 32-1/2" undermount kitchen sink raises the bar on functionality and professional styling with options for custom accessories (sold separately) that integrate seamlessly within the bowl's ledge. Billings kitchen sinks are made of KOHLER® Neoroc, a matte-finish composite material designed for extreme durability and unmatched beauty. Richly colored to complement any countertop, Neoroc resists scratches, stains, and fading and is highly heat- and impact-resistant. The kitchen sink undermount features a large, deep bowl that allows you to soak and clean large cookware and bakeware. This sink also has easy-to-clean rounded corners.