All of our copper sinks are made from 99% pure-mined copper. Each sink is hand-crafted and expertly hammered to achieve a unique and eautifully textured finish. All sinks feature an aged or unique patina, which gradually changes over time, and works alongside the hand-hammered finish to conceal any scratches and may occur. -maintenance. Additionally copper is a low maintennace choice. Cueto the handmade nature of these sinks, dimensions may vary up to a quarter of an inch in any direction.