Electrical metallic tubing (emt) Details Thickness range: 1.0-2.1mm Outer diameter: 0.5-4inch Surface treatment:galvanized Material: q195, q235, q345, a53-369, a500 Standard: astm a53-2007, astm a106-2006 Technology: erw Pipe, pre galvanized steel pipes, pipe fittings, black round steel pipes, black square steel pipes, pre-galvanized steel round pipes, corrugated sheets, pre-galvanized steel square pipes etc. Low price but high quality. Electrical metallic tubing, steel pipe, pre galvanized steel pipes factory china