Pro-Shot 9mm Pistol Bore Brush Pack of 12. Construction consists of a high quality brass core and coupling with bronze bristles. Will not harm the bore. Specific size for each caliber with each brush being oversized for extended life. American Standard #5-40 thread. Pack of 12. Specifications for Pro-Shot Brass Core-Bronze Bristle Pistol Length Bore Brush: Manufacturer: Pro-Shot Included Accessories: Brushes Package Contents: Pro-Shot Brass Core-Bronze Bristle Pistol Length Bore Brush The Pro-Shot Brass Core-Bronze Bristle Pistol Length Bore Brush 9mm 9P is a quality addition to the Pro-Shot lineup. For more great deals on Cleaning Rods & Accessories by Pro-Shot please browse our Pro-Shot Gun Cleaning Kits page. Pro-Shot 9P-CS: 9mm Pistol Bore Brush Pack of 12