Lyman Case Cleaning Media is the most effective choice for cleaning dirty and tarnished cases. Tufnut plus is made from natural processed walnut shells combined with a polishing agent. A few hours in a Lyman Turbo Tumbler and cases are clean, polished to a high luster and ready for reloading. Size 7 lb Type Tufnut Series Tufnut Media Weight 5.75 lbs Caliber universal Function Clean & Polishes Cases Material Ground Walnut Shells Quantity 1 Media Type Walnut Hull/Polishing Agent Compatible With Any Caliber