The Breakthrough Clean Technologies® .357 & .38 Caliber & 9mm Bore Mop 100% Cotton Cleaning Swabs are soft, washable and effective in getting your bore clean. Standard #8-32 thread (standard shotgun #5/16-27 thread on 20g/12g). Available for most gauges and rifle calibers. Product Features • .357 & .38 cal. & 9mm bore mop cleaning swabs are soft, washable & effective in getting your bore clean. • Standard #8-32 thread (standard shotgun #5/16-27 thread on 20g/12g). • 100% cotton • Available for m
