This sink is hand-hammered from 100% recycled copper by master artisans. Through years of skill and experience passed down from previous generations, the end result is a one-of-a-kind work of art. Made from 18 gauge copper, the beautiful sink has a warm antique finish and a rolled lip, allowing for a smooth drop-in installation. Standard 1.5" drain for U.S. plumbing connections. Due to the handcrafted nature of this product, it will vary in appearance, finish, texture, hammering and other details. It is advised the you receive the actual piece before making any installation cuts. Included with the sink is a 19 hole strainer drain constructed of solid brass for strength and durability. Finished in oil rubbed bronze, the drain assembly has two rubber seals, a plastic spacer, and brass fastener. Copper is amazingly easy to maintain. Fingerprints do not show as they will on stainless steel and other metals. For basic cleaning simply use a mild soap and water, other cleaners are not necessary. Copper has a living finish and its patina will continue to develop character over time, meaning it will become a richer, darker color. The patina creates a unique look of light and dark tones complementing each other. Made with the highest standards of quality and creative design, The sink adds artful function and charm to any bath or powder room.