The Proof Positive 6mm Nylon Bore Brush provides effective barrel cleaning for 6mm caliber firearms with gentle yet thorough nylon bristles that won't damage your barrel's rifling.Proof Positive 6mm Nylon Bore Brushes - 3-PackDesigned specifically for 6mm caliber firearmsDurable nylon bristles for safe barrel cleaningWon't scratch or damage rifle boreConvenient 3-pack for multiple cleaningsEssential for proper firearm maintenance these nylon bore brushes effectively remove fouling and residue while protecting your barrel's precision rifling for consistent accuracy.