... Usage: Be widely used in furniture, building and construction Industry, traffic andcommunication, and so on. Product nameGalvanized Square PipeSpecification20mm*20mm ... techniquecoupling, necking, punching and so on.Usage industryPetrol, gas, water pipe,construction,chimney pot.PackagingBundle,bulk ... rolled, hot rolled, hot dipped, ERW pipe and so on.We sincerely hope to establish business ...