D’Vontz copper is crafted by the world’s finest artisans by hand. Sizes may vary slightly and the hand patina process can produce a shade variance. We do not supply templates with the copper sinks, we recommend that you use the exact sink to make a template, if you order multiples, please make a new template for each sink. The patina is a living finish, which carries no warranty or guarantee. Your patina can change over time or be stripped away depending on use. We recommend waxing your sink once it is installed and using a mild dishwashing liquid and a soft cloth for care. Copper is a natural antibacterial product, there is no need to use harsh chemicals.