... : 10x10mm-600x600mm 2)WT: 0.5-15m Squre Hollow Section/Square Steel Pipe/Square Tube. As the profeesional steel pipes and ... manufacture in China,we cansupply straight seam steel pipe,spiral steel pipe,seamless steel pipe,elbow, bend,end cap,flange,tee,reducer ... (concentric and eccentric) and high pressure pipe with competitive price and excellent product. Description of Square ...