Hoppe's 24033V BoreSnake Viper Shotgun Bore Cleaner, 20 Gauge Washable and reusable quickest 3 step bore shine Brass weight on the pull cord Cone shaped bore guide on the leading end The world's quickest 3-step bore shine 50-Percent more brush cleaning power than the original BoreSnake Coneshaped bore guide for quicker alignment Patented one-piece design; machine washable