Materials:Brass or stainless steel ,brass with nickel planted Sealing materials:Silicon rubber,Neoprene,Teflon,PA6 Explosion mark:Exd IIC Gb/Exe II Gb/Ex tD A21 IP68 Fireproof grade:V0(UL94) Environment condition:Zone1,Zone2 IIA-IIC Explosive gas atmosphere,Strict21,22 inflammable dust environment,it is Widely used in oil extraction, refining, chemical, military and so on hazardous environment places cable clamping and sealing.