MSA Millennium CBRN Gas Mask. Full-Face Respirator Size : Small. These are nice looking masks Minor Scratches from storage noted Normal Expected Yellowing Noted Looks like they have very little if any prior use. The item “(1) One MSA Millennium CBRN Gas Mask Size Small Full-Face Respirator” is in sale since Monday, July 27, 2020. This item is in the category “Collectibles\Militaria\Surplus\Personal, Field Gear\Gas Masks”. The seller is “popsh82″ and is located in Peoria, Arizona. This item can be shipped to United States.