The copper cleaning brush in the .24-.26 caliber range (6 mm – 6.5 mm) was developed for thorough and effective barrel cleaning of medium-caliber firearms. With its finely worked copper bristles, it reliably removes stubborn soiling such as powder residue, tombac or oil carbon. At the same time, it is gentle on the barrel and does not attack the material inside. Ideal for hunters and sports shooters who rely on reliable deep cleaning – whether after the shooting range or before storage.