Inspired by the outdoor elements, driven by functional design. Novatto's black granite vessel will add charm to any bath. Our granite vessels come from around the world to become your one-of-a-kind bath masterpiece. This 18-inch square vessel has a natural chiseled exterior with a polished inside. Black granite is very consistent and little variation should occur from sink to sink. These sinks are designed for above-counter installation. A unique gravity flow drain is positioned on center in the front of the sink. This drain has a 1.75-inch opening for standard connections. Included with the sink is Novatto's brushed nickel umbrella drain, constructed of solid brass for strength and durability.For easy maintenance apply the included Glacier Ice sealer. This will help seal the pores in the stone to prevent water spotting. For best cleaning results, a soft cloth with mild soap and water or a non-abrasive stone cleaner is recommended. Novatto strives to provide superior products with exceptional qualities and unique innovations professionals and homeowners trust.