Penny Brite Copper Cleaner. 7 oz. bottle. Cleans copper, stainless steal and brass. Easy to use creamy paste/gel. Biodegradeable and safe for the environment. Great for cleaning metals for enameling and etching. You will never find ammonia, chlorine, sulfuric acid or carcinogenic benzene derivatives in Penny Brite Copper Cleaner-no rubber gloves needed! 7oz bottle. Not for use on Stainless Steel appliances.