Flitz tumbler media additive will not harm any metal or primer or stress brass.Suitable for corn cob, walnut or other media, using flitz tumbler media cuts tumbling time in half.It will clean, polish and protect brass and nickel and copper with no buildup.It is ammonia free and eco safe.Type: Tumbler Media AdditiveSize: 7.6 ozQuantity: 1Bristle Type: NoneIncludes: PolishProtects: Brass, Nickel, CopperSuitable For: Corn Cob, WalnutEco-friendly: YesHazair: Yes