1.PROFESSIONAL MANUFACTURE 2. ASTM ,GB ,JIS ,Q235,SS400 . 3.HIGH QUALITY AND COMPETITIVE PRICE 4.GOOD SERVICE Square pipe is applicable to frame for civill construction,furniture and ect. ProductSquare Pipe Black anneal pipeBright pipePre-galvanized pipeCold hard pipeOut Diameter(mm)10*10 to 100*100Thickness(mm)0.3 to 2.0LengthAny lengthStandardsASTM,DIN,JIS,GBMaterialQ195 to ...