M53 Gas Mask Air Purifying Respirator SEAL DEVGRU CAG Medium right hand These mask are primarily used by United States Special Operation Units across all branches. Condition : almost brand new These accept all standard 40mm nato filters. This set comes with: -M53 Mask Carrying Bag Grey sealed 40mm filter Operators card Waterproof Storage bag Operators Manual Clear Outserts assembly VPU This set is a Medium with Filter on the left side of the face. This item is ITAR Restricted.