Brownells .17 Cal #5-40 Male Bore Mop, Pack of 3

This classic wool bore mop soaks up bore cleaner or oil and distributes it evenly throughout your barrel. The natural spring of the wool conforms to the rifling for full coverage and the brass shank and coupling are looped and twisted to avoid damaging your bore. 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 5-40