Valved Mask with active carbon: CE /N95, N99 /AS NZS Standard: European: EN149: FFP1, FFP2,FFP3 American: NOSH N95,N99 Austrilia: AS/NZS 1716 ... , metal processing, chemical, smoke, powder, and worse workshops.Back of respirator: Packing:5pcs/box 100pcs/ctn 6/5kgs 70x31x34cm 389ctn/20’