Reduces odors and chemicals released into the air. Eliminates difficult and expensive to clean chemical splatters. Will not mar firearm's barrel finish. Easy to attach with no tools required. Quick and simple emptying and cleaning. Compact, portable and easy to store. Constructed of chemically resistant compounds. Accommodates rifles and either single or double barrel O/U or S/S shotguns. (Not designed for use with lever action, standard muzzleloader or other firearms not allowing cleaning through the breech mechanism) Blue.