The Hoppe's 1324 Cleaning Swabs are designed specifically for .40/.45 caliber firearms and crafted from 100% cotton for superior cleaning performance.Hoppe's 1324 Cleaning Swabs for .40/.45 caliber100% cotton construction for optimal absorptionSoft and washable for repeated useGentle yet effective cleaning action10-pack quantity for extended useCompatible with all .40 and .45 caliber firearmsEssential for proper firearm maintenance these cotton swabs provide thorough cleaning while being gentle on your firearm's barrel and components.