Brownells .40 Cal/10mm #8-32 Male Bore Mop, Pack of 12

Perfect for oiling or cleaning, this virgin wool mop applies product evenly throughout the bore. It flexes with the rifling naturally and the looped brass coupling won't scratch or scar your barrel. Material composition includes wool fibers, brass shank and precision-engineered coupling components for enhanced durability and performance Length is 3.27 inches, thread size is 8-32