Dear Sir/Madam,Standard:ASTM,BS,GB,JIS,APIGrade:Q195-Q345,ST35-ST52,A53-A369Thickness:0.5 - 20 mmSection Shape:Square and rectangularSecondary Or Not:Non-secondaryApplication:Construction, Steel structure, Building material, Machinery partsTechnique:ERWCertification:ISO,CE,FPCSurface Treatment:Black painted o black oiledSpecial Pipe:Thick Wall PipeAlloy Or Not:Non-alloyBrand:YOUFA GroupSurface:black oiled and black painted or galvanizedPackage:Sea-worthy PackagePayment terms:L/C OR T/TKey word1:rectangular tubeKeyword2:square pipeKeyword3:hollow sectionwe need 2000 units reply back to Show More