Outers .22 - .257 Caliber/6-6.5mm Wool Mop/Swab Made of the highest quality materials Hunting gun Cleaning supplies Another quality Bushnell product 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