Seamless bowl construction, attached seamless backsplash. Rectangular "Wave" Bowl w/ radius edge. 4" oc faucet holes compatible with most standard lavatory faucets. 100% waterproof non-Porous surface is easy to clean and keep clean, no seams for mold or mildew buildup. No caulking or sealing necessary. Will not discolor, etch or stain. Engineered stone is light and easy to install. Variety of colors and sizes available in stock.