... , ASTM A106, EN10216, EN10219, ect.CoatingOiled, Z-coating, black paintingPackingpacked in bundle for small size, single piece for large sizeUsedConstruction, transportation ... offer special sizes as you request.DETAIL PRODUCT DESCRIPTION: black square pipe/carbon steel tube/welded pipe NAME OF PRODUCTSquare tube,Rectangular tube,Gi Square ...