The Moldex 5904 disposable half mask is for protection against organic gases/vapours with boiling points above 65C, such as solvents used in adhesives, paints, paint sprays and pesticides. Also protection against inorganic gases and vapours e.g. chlorine, bromine hydrogen cyanide, hydrogen sulphide, and acid gases, hydrogen chloride, nitric acid etc, plus ammonia and amine derivatives.Convenient and easy to use the Moldex 5904 is supplied pre-assembled and ready for use in any application where gases and vapours may be found. Dual-material construction weighs less for maximum comfort. Gas filter cartridges permanently mounted to the face piece with built in inhalation valves.Size Medium / Large.