Houzer CHTO-1800-1 Opus Series top mount stainless steel oval bathroom sink features all-classic curves, beautiful lines, and a lustrous satin finish that is easy to clean and maintain. The sink has a standard 1-1/2" drain opening with an overflow hole and includes a mounting clip. Comes with a lifetime limited warranty that protects against defects in material and workmanship and meets ASME 100.19.3-2000 and UPC standards.