Silicone masks 3M7501 Silicone gas mask / 3M7502 the silicone gas masks produced by 3M Company, Advanced siliceous material, more comfortable to wear, longer life, and can be cleaned. At the same time, 3M patented cold flow exhalation valve, expiratory resistance and reduce the heat, humidity, CO2 accumulate within the mask, is more suitable for use in the harsh environment of high fever, high temperature, high concentration. Headband in two modes: the headband can be adjusted freely into standard sex together hanging. Dual filter cartridge design, low inspiratory resistance, all-silicone material, comfortable and durable type mask. Features: 3M7501 silicone gas mask 3MTM patented cold flow exhalation valve and exhale smooth down breathing valve cover design, the valve can not be easily contaminated headband can be adjusted into Trailer, and can take off the mask hanging in the neck easy to work, the rest can be concentrated water flow, cleaning and maintenance convenient dust-proof, anti-virus or a combination of the toxic dust protective filter element for selection into the gas-3M7501 the silicone gas masks comply with the the U.S. NIOSH certification application areas: casting, laboratory, agriculture, petrochemicals, bottom qi cleaning industry. NB 7501 (trumpet); 7502 (in number) Chee Industrial Co., Ltd. professional sales agent of the silicone gas masks of 3M7501 Silicone gas mask / 3M7502, quality assurance, price concessions, and to greet the a 10.1 National Day and Mid-Autumn Festival offers bargain activities fiery See www.shzhian.cn, we provide more