# Otis Technology Cleaning Patches The small caliber 2 Inch patches are designed for .17 caliber to .22 caliber rim fire. The all caliber 3 Inch patches are designed to clean .243 cal through 12/10ga firearms by its proprietary patch method Each patch is 100% cotton and can be used up to six times, offering six new clean surfaces. When attached to the slotted tip, they form a perfectly circular cleaning swab for 360 degree coverage.