1.MF11B activated carbon filter gas mask(Silica Gel gas mask) 2.ISO9001,CEcertificate,GB2890- ... is a contaminated NBC agent, the gas mask provides effective protection to the wearers respiratory organs ... canister2.Head harness type mask with lightweight canister1) Service life: (min) >50min, CNCI: 1.5mg/L, 30L/min ... : 35%7) Total weight: < 800g8) The mask is available in three sizes, (small, medium, large ...