Made from one of Earth's most precious stones, a Novatto marble vessel will add character and charm to your bath. The marble comes from around the world to become a one-of-a-kind bath masterpiece. Natural material cannot be compared to everyday synthetic porcelain and ceramics. Honed and hand-polished to perfection, each vessel is beautifully unique. Because marble is from Mother Nature, the sinks will vary slightly in color and veining. Designed for above-counter installation, they have a 1.75-inch drain opening for standard U.S. plumbing connections. For best cleaning results, a soft cloth with mild soap and water or a non-abrasive glass cleaner is recommended. A stone sealant should be used to help protect the surface and allow for easier cleaning. Just add water and enjoy Novatto's limited lifetime warranty. Supreme packaging and boxing ensure damage-free delivery. Novatto strives to provide superior products with exceptional qualities and unique innovations that professionals and homeowners trust.