For cleaning percussion muzzle loading rifles and flint lock rifles with removable touch hole liners. An 18" plastic tube with special nipple. Install nipple in rifle, place end of tube in a pail of hot soapy water or solvent, then swab bore with tight patch. Water will be pumped in and out of the bore to remove fouling. Available in 6-.75mm, 6-1mm, 1/4-28, 5/16-24 threads