... : 15*15mm-400*400mm, WT: 0.6mm-12mm hollow pipeSQUARE PIPE BEST QUALITY LOWEST PRICEProduct nameSquare tubeSpecificationOD: 15*15mm-400 ... ,GB/T3091-2001Zn coating mass200-400g/m2 (glanvaized square pipe)Length of the Gi Square Pipe5.8m-12mProcessing techniqueThreading, ... necking, punching and so on.Usage industryPetrol, gas, water pipe,construction,chimney pot.PackagingBundle,bulk in container or as per ...