Otis patches are 100% cotton and each patch can be used up to 6 times, offering 6 new clean surfaces. When attached to the slotted tip, they form a perfectly circular cleaning swab to allow for 360 degree coverage! They are available in several sizes: The All-caliber cleaning patches are unique in that one patch cleans all firearms from .22 caliber to 12/10 gauge. Size: 3" The panoply patches are designed specifically for rifles .30 caliber and up, handguns 9mm and up, and all shotguns. Size: 3" The small caliber patches are intended for .17 caliber to .22 caliber rim-fire. Size: 2"