The Mansfield Enso Vessel Lavatory Model 311-BISC is a Biscuit 22?x20?oval sink. This sink is a vessel sink so to install you just mount it to your counter. The Mansfield Enso Vessel Lavatory Model 311-BISC is made of a durable vitreous china material that comes in only single hole faucet models. The Mansfield Enso Vessel Lavatory Model 311-BISC comes with the limited lifetime Mansfield warranty. Mansfield is an American company that?s been in business since 1929, and has been one of the top producers in design, and quality for the past 80 years. They are the largest domestic producer of sanitary ware, and strive to ensure you get the best products available.