The Mansfield Maple Bone undermount Lavatory Model 217-BONE is a Bone 20?x16?oval sink. This lavatory is installed by attaching them to the underside of your counter, doing this will give you a seamless look. The Maple Bone undermount Lavatory Model 217-BONE is made of a durable vitreous china material with a concealed overflow. The Maple Bone undermount Lavatory Model 217-BONE 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.