Nantucket Sinks rectangular 23-inch self-rimming vanity sink features 3 holes with 8 inch centers. A classic clean and modern design with drop-in installation will bring effortless style to your bath or powder room. Constructed of durable vitreous china, super practical and easy clean. Sealed with an enamel glaze for a high gloss finish. Beautifully sloped basin for good water drainage. 1.75″ standard vanity drain size. This sink has an overflow hole. All dimensions are nominal and may vary by .25″ from actual. This sink is ADA compliant when installed according to ADA guidelines . ASME A112.19.2-2013 and cUPC certified.