Undermount bathroom sink glazed twice for durable and smooth. Glaze has high density, does not absorb residue, prevents yellowing and aging, and is easy to clean Vessel sink has a overflow for fast drain, effectively avoid water overflow, preventing wet counter-tops, keeping your bathroom clean and dry. Rectangle Bathroom Sink Undermount Premium Quality Ceramic Construction, low water absorption, acid resistance, Smooth and polished surface, and easily wipes clean. Modern contemporary classic Add high-style to any bathroom or bar vanity with this white Undercounter sink, which offers modern, minimalist elegance and glamour to instantly update any room. Exterior Size: 20 5/8" L x 14 6/8" W x 8 1/8" H. Interior Size: 18 3/8" L x 12 4/8" W x 6 1/8" H.