The P0322UW rectangular porcelain undermount sink is made from true vitreous China which is triple glazed and triple fired to ensure your sink is durable and strong. Undermounting a bathroom sink creates a sleek look and allows for more space on your countertop. The overall dimensions for the U2230-white are 17" x 17 1/2" x 5 1/2" and requires an 18" minimum cabinet size. Pop-up drains in a variety of finishes are available with this sink model. As always, our porcelain sinks are covered under a limited lifetime warranty for as long as you own the sink.