gas mask 1.silica gel material,abs framwork 2.ISO 9000 3.with activated carbon box, 4.have three kinds of cartridges,A.K.E, 9001 gas mask: More Information: Name Model Paking Quantity G/N Weight Paking Size Smoke mask 9001 Carton packaging 20pcs 4/3kg 53*26*34cm Filter 9001 Carton packaging 400pcs 3/2kg 46*31*15cm