Masks & Respirators - Cbrn
40mm NATO NBC CBRN Gas Mask Filter New Vacuum Sealed M40 MCU M45 Avon M53 FM53 . This auction is for a lot of 4 40mm NATO NBC CBRN filters. The filters are Korean manufactured and are still vacuum sealed. These are military surplus filters. They will work with any standard 40mm threaded gas mask. Gas mask not included) Fast Free Priority Shipping.