Old new stock Swedish A4. Gas Mask, takes 40mm filters with one 40mm filter included. The included filter is an opened Scott police issue filter I used to test the mask. I believe this is the civilian version of the military mask as there is no drinking tube. This is one of several I had on hand but I’ve upgraded to Scott M95s and no longer need this one. The item “Forsheda A4 Swedish Gas Mask Respirator-CBRN-Size 2 (Medium)” is in sale since Sunday, June 14, 2020. This item is in the category “Collectibles\Militaria\Surplus\Personal, Field Gear\Gas Masks”. The seller is “spur0701″ and is located in Great Falls, Virginia. This item can be shipped to United States.