Birchwood Casey Nylon 9mm/.38/.357 Caliber Looped Pistol Brush 3 Pk BC41210 3 Pack of Birchwood Casey Looped Handgun Brushes quickly cleans your handguns. Stands up to tough solvents and is offered in multiple handgun calibers. 9″ looped nylon cleaning brushes. Caliber: 9mm, .357, .38. Length: 9″. Quantity: 3 Per/Pack.