Materials:Brass,Stainless steel 304,316 Surface treatment:Nickel planted,Passivation Sealing materials:Silicon rubber,Neoprene,Teflon,PA6 Explosion mark:Exd IIC Gb/Exe II Gb/Ex tD A21 IP68 Fireproof grade:V0(UL94) Protection level:IP68 (screwed-on the cap) Ambient temperature:Static from -60 to 100,short up to 120 Dynamic from -20 to 80,short up to 100 without halide. Environment condition:Zone1,Zone2 IIA-IIC Explosive gas atmosphere,Strict21,22 inflammable dust environment,it is widely used in petroleum, chemical, warehouse, food, pharmaceutical, military and other electrical cable fixing and sealing. For thread,M thread,G thread,NPT thread can all be provided. For details,welcome to check our website:www.exproofcablegland.com If some requirement,welcome to contact with us.