Clean, attractive brass should be the goal of every reloader, but this can't be achieved without making sure your tumbler is also clean. Thanks to Frankford Arsenal's Treated Corn Cob Media, you can make sure your vibratory case tumblers are properly polished. Besides ensuring long life for the most valuable component of your ammunition, cleaning your brass will help reduce wear and tear on your expensive reloading dies and the chamber of your firearm. Treated Corn Cob Media has brass polish added for optimum use. Corn is also known for polishing better than walnut. Comes in a 4.5-lb. reusable plastic container.