Drger Filter Drger A2B2E2K2 Hg P3 R D Filter fr X plore 6300 German DRAGER Gas Mask, Filter and Bag (2) (Z5) NBC Gas Mask Respirator Filter Cartridge Replacement RD40 40mm NATO Co Drger A2 P3 Nuclear Reactor RD 40mm Gas Mask Filter 40mm NA to Drger Filter. The 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 A2B2E2K1P3 NBC filter, offers comprehensive protection capabilities. However, its expiration date (2019 2021) limits its use to display or collection purposes only. The filter remains unused, sealed at the bottom, and still retains a yellow label on the side. Its condition makes it an ideal addition to any military memorabilia display, gas mask collection, or reenactment setup. The 40mm NBC filter holds significant historical value, representing advanced military technology and offering a rare glimpse into protective equipment used during a critical time. Whether you are a collector, history buff, or appreciate military surplus, this filter will enhance your collection. Its unique design and condition make it a standout piece in any display.