... ~1000mm Thickness: 2mm~100mm Length: <=14m Big size Square or rectangle steel tube with good quality and reasonable price , specifications range ... 3466 , DIN EN 10210, DIN EN10219, ASTM A500, GB/T 3094-2000, GB/T 6728-20024) Use: construction structure, machinery, container , hall ... -0592-5580660;MOB:86-138-0608-6535; Big Sized Steel Rectangle Tubes