The hoppe's no.9 foaming bore cleaner quickly and effortlessly dissolves and removes copper and powder residue.Its superior cleaning formula does the work for you no brushing or other mechanical cleaning necessary.Orange foam will turn blue indicating copper removal or black indicating powder removal.Type: Foam CleanerSize: 3 ozQuantity: 1 CanMaterial: MultipleProtects: Against Copper Build Up FoulingSuitable For: FirearmsHazair: Yes