Hoppe's black high-performance copper cleaner is formulated with high round count firearms in mind but is suitable to use on any firearm bore.This copper cleaner is a superior formula engineered to remove high amounts of stubborn copper fouling from any firearm bore after a long day out at the range.Step two of the hoppe's black five step cleaning system.Type: Copper RemoverSize: 4 ozQuantity: 1 BottleMaterial: MultipleProtects: Removes Copper FoulingSuitable For: FirearmsHazair: Yes