... thickness: 0.8-1.2mm material: q195-q235 finishi: black annealed Steel window hollow sectionsize: 28*28, 38*38thickness: ... 0.8-1.2mmmaterial: q195-q235finishi: black annealedStandard: JIS, AISI, ASTM, GB, DIN, ENPlace of ... normal standard toleranceShape: round,square,rectangularsurface: pickled, acid, polished, black,ectcertificate: ISO, BV, API, CSC,DNV,ectnormal length: 1000mm ...