Product: steel tube Surface: hot dip galvanized Outer diameter:38.1,42.3,48.3,48. ... :BS Product: steel tube /scaffolding tube/ steel pipeSurface: hot dip galvanized Outer diameter:38.1,42.3,48.3,48.6 ... JISG3444:2004Steel Grade: Q235B, Q345B,S235JR,S275JR,STK400/500Surface processing: hot dipped galvanized, electro galvanized, black, painted, threaded, engravedSpecification: Outer Diameter(mm) Wall ...