Outers .20/.204 Caliber Wool Mop/Swab (5-40 Threads) Professional gun cleaning supplies Outers product Cleaning mops Precise brush diameters to assure complete bore coverage on specific calibers Blended wool minimizes lint buildup Maximizes absorbency to reduce overall cleaning time Specially-engineered looped core and tip to protect muzzle, chamber and rifling Easy to clean