PREMIUM MATERIAL: Our bathroom vessel sink is made of high density ceramic. Durable, smooth, non-porous and polished surface with low water absorption for more easily to clean and maintain. CUPC : This modern round bathroom sink meets U.S. and Canada high-quality standard (Uniform Plumbing Code), certified by IAMPO. ASY IN INSTALLATION: Above-counter design allows you install your vessel sink without replacing the entire vanity, our sink has US standard 1.75” drain opening. Exterior dimensions:16 "x13"x4.5", it is regular size fits most countertops and this compact washing basin it is ideal for smaller bathroom, powder rooms or bars Warranty and Service：3 month hassle free return and money back, pls buy with confidence. If any question for this product, welcome to contact us. Kichae promise you a reliable after-sale service.