Kleen-Bore Cotton Mop Package Fits 12 Gauge 5.16-27 Threads Mop12 Made Of 100% Cotton And Steel Core Wire, This Heavy Duty Bore Mop provides The Best Absorbency Over Any Synthetic Fiber Mop, Making Our Cotton mops The Best Available For Cleaning And Lubricating Various Calibers Of Firearms. This highly Absorbent Cleaning Mop Is Ideal For applying solvents To a fouled Bore Or using a Separate Mop To Apply lubricants after Cleaning Is Complete. Specifications: - Fits: Shotgun, 12 Gauge 5.16-27 Threads - Made Of 100% Cotton And Steel Core Wire