Application and feature The GM-II gas mask is a protect equipment, with filtered respiration and one eye window for person. The mask can provide effective protectionto the wearer's face, eyes and respiratory tract. Prevent the harm of toxic, biological and radiation dust. It is designed for using in Industry, agriculture, medicine and scientific research and can also be used in military, police and civil defense etc. The face visor treated specially, to wear comfortable and leak-free fit, can satisfy more than 95% adult. The five string can be adjusted at random, have elasticity and suitable. The lens of the curve window can cut off water. Moreover, of course the wearer has a good sight.Large eyes window lens are manufactured from polycarbonate. It provides a wide visual field and excellent optical properties and has good abrasion and shock resistance. The megaphone is installed inside, which can make the sound clearly passes through.According to object of protection, different kinds of canisters can be selected. GM-II gas mask is produced according to GB2890-95 GAS MASK USING TECHNICAL CONDITION. Specifications2.1 Gas life: Depending on the selected canister. 2.2 Exhalation resistance: not more that 98pa (at 30l/min) 2.3 Visual field: Total visual field: not less than 75%. Binocular visual field: not less than 60%.Below visual field: not less than 40 degrees. 2.4 Oil mist penetration coefficient: not more than 0.005%. 2.5 Leak coefficient: not more than 0.005%.2.6 Storage life: the mask canister in providing conditions, storage life is 5years.Use an Safeguard3.1 When wear mask, from lower jaw to upwardthen properly adjust string. After that, block up canister air entry by palm, then breath yourself, the face visor tight stick with face, no leak, indicate areas to work.3.2 After using, clean all parts of sweat and dirties, especially lens, expiration valve, inspiration valve should be clean. If necessary,face visor can be washed with clear water.3.3 After used in polluted environment, face visor and canister should be cleaned and disinfected with 1% of over the sour disinfections liquid of oxygen B. If necessary, face visor can be soaked in 1% of over the sour disinfections liquid of oxygen B. But the canister can't be soaked, prevent from entering water and losing its function. After the mask disinfecting with disinfected liquid, should clean with clear water, dry and stand-by.