The Thompson/Center T17 Black Powder Bore Solvent is specially formulated to clean and neutralize the harmful fouling left in the bore from Triple Seven and other black powder substitutes. The T17 solvent also assists in removing plastic, copper and lead deposits that could affect the accuracy of your rifle. The Black Powder Bore Solvent leaves a micro-thin layer of protectant in your rifle's bore to prevent rust and corrosion, and makes rifle loading a breeze. Active ingredients in the T17 solvent penetrate even the most caked-on fouling to help restore the bore of your rifle to like-new condition. The Black Powder Solvent comes in a handy, 8 oz. squeeze bottle. FeaturesPrevents rust, corrosion and aids in easy loadingFormulated for Triple 7 & black powder substitutes8 oz. squeeze bottle