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Mfg Item #: BT357/38/9BM
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The Breakthrough Clean .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.