... DIN, EN, BS, JIS, UL, galvanized, painted rectangular, square certificate:CE, ISO9001 square steel tube, rectangular or square, according to standards ASTM A53, ASTM A106, ASTM ... EN10240, EN39(BS1139), DIN2440/DIN2444, JIS G3444, BS1387, DIN2394, DIN2395, or similar standards. According to buyer's request is available. SIZE ... , furniture tube and so onCERTIFICATE: ISO9001, UL, FM, CE square steel tube