Centers the cleaning rod in the bore to prevent rifling damage. Extra-long for scoped rifles. O-ring seals chamber and keeps solvents out of the action and trigger, holds bore guide firmly in place. Large replacement O-ring fits all guides and solvent port.
Silicone rubber O-ring. 9½" (24cm) long. #’s 2, 4, 5 and 6 fit bolt action rifles from Rem., Win., Ruger, Mauser, Savage, Stolle and Springfield.