Hoppe's No. 9 Gun Bore Cleaner 5oz.The Hoppe's No. 9 Synthetic Blend Bore Cleaner is designed specifically for modern firearms. The No. 9 Synthetic Blend is superior for removing carbon, lead, and copper fouling, and will leave your firearms extremely clean. The No. 9 Synthetic Blend may be hard on dirt and fowling, but it is completely safe to use on anodized aluminum, titanium, steel, chrome, nickel, plastic, poly carbonate, and rubber, so you can use it on any firearm. The Synthetic Blend Bore Cleaner biodegradable and non-flammable. Made in the USA!