These are tough, reusable foam tips engineered for 100% bore contact; spreading fluids more evenly than mops and patches without lint or fibers. Washable and reusable, they affix to a standard rifle & pistol rods with 8/32 thread. Features: Options: .22cal, .30cal, .357cal, .40cal and .45cal Each tip can be used multiple times and should substantially outlast a similar priced bag of patches. Washable and reusable Lint-free and fiber-free