Quick and complete barrel cleaning on all flintlock guns. Remove gun lock and clamp o-ring end over flintlock vent. Fits all rifles and pistols with barrels up to 1 1/8” at breech. Authentic appearance with non-corroding cast and machined parts. Small size and light weight for carrying in pouch. Use your choice of cleaners/solvents. Tube is 20” long; lower end fitted with brass “weight” for more security in the solution.