I.SummarizeAs individual protective equipment for personnel respiratory, , gas defence mask (Type:FZFD) canprotect the respiratory organ ,eyes and facial skin. Masks can be directly connected with the canister, or connect with the canisters with the airway. FZFD type gas mask can choose different sizes canisters according to the different protection requirements. Its used  for military, factories and mines, scientific research, ambulance, fire and other units.It meets the standard of GB2890-95.II.BodyThe body with an inner periphery and chin off the cover is made of black rubber molded ,which ensureadhesion with the face and comfortable to wear. This rubber is specially formulated to enhance the life of the mask and the skin without irritation. Easy to adjust the belt, it can quickly wear. Therefore, the gas mask can ensure airtight, and comfortable to wear in all cases, even when engaged in intense activity.III.Specification1. Protection objects: according to needs of different canisters,it can protect people from toxic gases, vapors and toxic smoke.2. Expiratory resistance: not more than 90 Pa (30 l / min)3. View: no less than 70% of the total field of vision, double vision is no less than 30%4. View Performance: when longer than 1.5 hours, without fogging the lens, without distortion anddeformation (-30 )5. Tightness:( Mist leak tightness factor): not more than 0.005%