... CQST Certified,Zone 1,2. 2,IP65. 3,The aluminium alloy of special high strength. 4.The intensity was high, shock-resistant. Industrial plugs ... Socket for Hazardous Areas is applying scope hazardous gas areas: Zone 1&2 ; Explosive gas or vapor atmospheres:class IIA, ... of special high strength, the intensity was high, shock-resistant Able to bear oil and most acid, alkali environment. Industrial plugs & ...