Perfect for collectors, reenactors, and cosplayers, this authentic Swiss Gas Mask Filter comes sealed in its own canister to provide ten plus year of safe storage life. Add the final touch to complete your gear, since its NATO threads will fit most masks. Please note that gas masks and gas mask filters are not for sale outside of the U.S.A. The Swiss Gas Mask Filter is sold as a novelty item only. Gas masks, filter, and accessories are not returnable or refundable.