This metal sample is the exact same material that your sink and metal accessories will be made of. We use the highest-quality domestic metals on the market. Our bronze is much harder than what is used for most imported sinks and in its raw form has a coloration similar to 18k gold. We naturally burnish the inside of your sink to create a low-maintenance finish, similar to our weathered copper sinks. Please call to discuss before ordering! You may order a raw bronze sink that has neither patina nor burnishing.