1 Ex e II DIP A21 TA 2 IP65 3 For zone 1, 2,21,22 4 corrugated pipe inside, woven with stainless steel outside Structure 1: internal thread at both endsG1/2" ~G3" Lenght: 700~1000mmStructure 2: internal thread at one end and external thread at the other endG1/2" ~G3" Lenght: 700~1000mmStructure 3: external thread at both endsG1/2" ~G3" Lenght: 700~1000mm Explosion-proof flexible conduit