The latest additions to Swanstone's expanding line of sinks are the new double-and single-bowl kitchen sinks made of fashionable quartz stone. Not only virtually indestructible (only a diamond is harder than quartz), these unique designs are sleek and contemporary, with a bowed edge creating more interior space to accommodate large dishes and pans. Either sink can be used as an undermount or as a drop in, and the standard sizes (the double is 33" x 22"; the single is 25" x 22") are ideal for remodeling projects using existing countertops or cabinets. Swanstone.