With a low price, Flitz Liquid Tumbler and Media Additive 7.6 ounce is a great product that gets the job done. This liquid formula is guaranteed to be safe for all primer and metals. It is also made to clean as well as polish brass, copper, nickel, and other metals. This media additive is also suitable for a variety of media forms, including corn cob and walnut. Used in tumbler machines, it produces exceptional polish. Another key benefit of using this additive is that it contains no ammonia, causes no buildup, and is an environmentally safe product.