respirator mask, 1.silica gel material, 2.with actived carbon cartridges, 3.A.K.E three kinds of cartridges, 4.ISO 9000, 9001 respirator and cartridge: More Information: Name Model Paking Quantity G/N Weight Paking Size Respirator mask 9001 Carton packaging 20pcs 4/3kg 53*26*34cmCartridge 9001 Carton packaging 400pcs 3/2kg 46*31*15cm