Explosion-proof cable-passing boxes: 1.Ex mark:Ex e II 2.Intended use:zone 1,2&21,22 3.Degree of protection:P65 Explosion-proof cable-passing boxes feature:1.Ex mark:Ex e II 2.Intended use:zone 1,2&21,223.Degree of protection:P654.Material:Epoxy resin powder sprayed aluminum Explosion-proof cable-passing boxes