... our good quality and service. 2. Production standard: ASTM A53, BS1387, EN10255, EN10240, EN10220, EN10219, EN39, JIS3. Section type: round, square ... :21.3mm-219.1mmWALL THICKNESS:0.8mm-12mmMax Length:12mSTANDARDASTM,BS1387-1985,GB/T3091-200, JIS, DIN, EN, AS1074, EN39, JIS,A500 ...