The Militaria Inc. .22 Caliber Cotton Bore Mop with Aluminum Stud, is made of the best materials that can be found for the shooting industry with careful design in size and caliber to do the job. Now multi packed (10 pieces per pack) so you don't run short when needed. The Cotton Mop quickly absorbs solvents and oils for bore cleaning. The resilient cotton mops will not degrade the weapon barrel. Each mop has an aluminum stud and works with industry standard 8/32 thread. The cotton mop is reusable. Simply wash the cotton in warm soapy water, rinse and let dry for next use.