Environmentally safe, ammonia-free formula works fast to breakdown and dissolve all traces of copper fouling caused by high-velocity, jacketed bullets commonly used in hunting and competition guns. Contains an enhanced binding agent that acts like a magnet to attract the dissolved copper, keeping it from re-depositing and allowing complete removal. Repeated use conditions the bore to help prevent future copper buildup, plus works like a rust preventative to shield and protect the metal from corrosion. Non-hazardous, biodegradable, odorless, and petroleum free. Safe to use on steel, stainless steel, and lined barrels. Mfg: Bore Tech SPECS: 4 fl. oz. (118 ml) squeeze bottle or 16 fl. oz. (473 ml) plastic bottle.