... 8-1.2mm material: q195-q235 finishi: black annealed Steel window hollow sectionsize: 28*28, ... -q235finishi: black annealedStandard: JIS, AISI, ASTM, GB, DIN, ENPlace of Origin: TIANJIN China (Mainland) ... round,square,rectangularsurface: pickled, acid, polished, black,ectcertificate: ISO, BV, API, CSC,DNV,ectnormal length: ... /321H, 304/304L, 316/316L, 310S etc. 2.Factory price Detailed discription :2. ...