1)ANSI C80.6 and C80.1 2)Thread conduit 3)Size:1/2" to 4" 4)galvanized steel,protect the wire... 1.size: 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4"2.materianl: China, GB/T 700: Q195; USA, Gr.B(σs185); International, ISO: HR2(σs195)3.IMC conduit standard: Follow 12424.IMC is lighter in weight, but as strong as Rigid. IMC is hot galvanized using Allied's patented in-line Flo-Coat ...