Brownells .50 Cal #8-32 Male Bore Mop, Pack of 12

Offering high absorbency and natural flexibility, this virgin wool mop is ideal for bore care. It carries a large volume of solvent or oil and conforms to rifling for even coverage. The brass shank is gentle on barrels and won't cause any damage. 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