Model Number: sino008-#1894 Brand Name: sino sources Key Specifications/Special Features: Galvanized pipe wholesale! Gi square pipe size rectangular steel tube Outer Diameter20*20-180*180mm; 20*30-150*200mm(hot dip and pregalvanized square steel pipe & rectangular pipe)Thickness0.8-5.75mm Length 4.5m-12m or as per your requirements Tolerance according to the specifically sizes Grade 10#-45#, 16Mn, A53-A369, Q195-Q345,etc Standard GB/T 3091; GB/T3094;GB/T6728; EN10219; ASTMA500; JISG3446,etc End beveled or square cut, plastic cap Application Construction structure, machinery making, container, hall structure, sun seeker, offshore oil field, sea trestle, motorcar cassis, airport structure, shipbuilding, automobile axle pipe and so on.