... ShengAnn[Material] : Silicone[Feature] : Good materials, superior sealing performance, wearing comfort.[Performance] : Effective filtration of gas, benzene, chlorine, chloroform and other ... : FD-9001[Standard] : GB2890-1995 ISO2000[Applications] : Toxic gas environment. [Packing] : Carton Packaging(53*27*33),A box containing ... 15cmK/4LH-04BE/7LH-07B high-end Respirator Mask of good quality for industry