... (50-120g/m2)5. Certificate: SGS/BV/ISO90016. Application areas: steel structure, curtain wall, fence/handrail, machinery, green house, communication, ... directly from warehousesCompany information:Centrue engaged in supplying square tube, angle steel, and channel steel,H beam, I beam.Centrue endeavor to consolidate ... guarantee delivery date and price advantages over the factory. Square Steel Tube