Otis Ripcord One Pass Bore Cleaner (Select Your Caliber) 10' Of Cleaning Surface Heat Resistant Up To 700 Degrees F Helix Shape Engages Rifling Through The Barrel Nomex Fibers Act As Both A Brush To Loosen And A Patch To Capture Fouling Particles Equipped With 8-32 Threaded Ends To Fit All Otis Cleaning Components