Tipton Bronze Rifle Bore Brush 30/32 Caliber - 10 pack These Bronze Bore Brushes clean your gun while protecting the bore from abrasion. Stiff bristles scrub away fouling and dirt but will not damage the rifling in the process. Features: - Fits: All .30 Calibers (308 to 311 bores) - Corrosion resistant bronze bristles (.325 Diameter) - Galvanized plated wire core with looped end - Thread: Standard 8 - 32" - Note: Will not fit Outers cleaning rods