Swanstone QUDB-3322.075 32-Inch by 21-Inch Undermount Double Bowl Kitchen Sink, Bianca Made with 80% actual quartz stone; only a diamond is harder Virtually indestructible - will not damage from kitchen use Mounts under most countertop materials including granite/quartz, solid surface and tile Ideal for remodeling or new construction 9-in deep bowls Made with 80-Percent quartz stone composite Virtually indestructible - will not damage from kitchen use Mounts under any countertop material including granite/quartz, solid surface and tile Ideal for remodeling or new construction 9-Inch deep bowls (229mm)