NEW! This pretreated media mix contains the Iosso Case Polish and corn cobb. The mixture works quickly to remove carbon, powder fouling, oxidation & stains. It shines to a high luster and leaves a protective coating to inhibit future tarnish. It drastically reduces tumbling time. This USDA Certified Bio-Based product is biodegradable and has no odor. Available in 3# and 20#(5 gallon pail).