BW German cartridge Drager Nato filter replacement NEW 1PCSThe 40mm NBC filter offers a rare and valuable piece of military history. This authentic Drger gas mask NBC filter provides advanced chemical, biological, and particulate protection. Though no longer suitable for active use, it remains an excellent item for collectors and enthusiasts of historical military equipment. The filter fits standard NATO Rd40 40 x 1 7 threads, ensuring compatibility with most military grade gas masks. This specific model, the