Otis&'; cleaning patches is 100 percent cotton and can be used up to 6 times, offering 6 new clean surfaces. It is unique in that one patch cleans all firearms from .25 caliber to 12/10 gauge. When attached to a slotted tip, they form a perfectly circular cleaning swab to allow for 360 degree coverage.This model is 3" and comes in a pack of 100. Specifications and Features:Otis Technology FG-919-1003" Round Cleaning Patches100% Cotton.25 Caliber up to 12/10 GaugeEach patch can be used up to 6 times360 degree cleaning coverage100 Count