Swanstone QZ03322SB.173 Granite 1-Hole Dual Mount Single-Bowl Kitchen Sink, 44-in L X 22-in H X 9-in H, Metallico Made with 80% quartz stone, only a diamond is harder The design of this large, single bowl sink combines high functionality with clean, elegant lines Can be installed as a drop-in or undermount, offering design flexibility Pre-drilled with 1 hole and can be drilled up to 2 additional holes Standard size is ideal for remodeling or new construction Virtually indestructible will not damage from kitchen use Recommended for high-use traffic areas and commercial surfaces Heat resistance to 392F, 200C Limited lifetime warranty