Aquaterior oval shape glass sink features transparent gray and sleek line design Tempered glass with smooth surface for not easy to leave stains and convenient to clean and maintain 21 5/8' length large size basin is perfect for large counter, can prevent water from spilling out easily Just drill a suitable hole on the countertop to install, without replacing the vanity We offer 1-year warranty and CUPC certification for quality assurance; online customer service for installation is available