Nantucket Sinks Great Point 21" Rectangular Drop-In Porcelain Enamel Glazed White Ceramic Vanity SinkNantucket Sinks 21 inch self rimming vanity sink is an artistic fixture for your bath . Sculptural and contemporary, the low profile design creates a feature much like an infinity pool on your vanity. Installed as a drop in or top mount, it creates an elegant edge less look. Constructed of durable vitreous china, it is practical and easy to wipe clean. Sealed with a high gloss enamel glaze. The sloped basin allows for good water drainage. No overflow.