... .B with own factory thickness:0.3-2.5mm name: supply hot rolled hollow section( FACTORY) Diameter: 20*20---800*800 Wall ... /T9711.1-1997, API Material:Q195, Q215,Q235,Q345,ST37-2,ST52-3,S235,S355, 20#etc Diamete20*20---800*800Wall ... -12mm or as per the client's requirementPacking1. in bulk 2. packed by steel strip into bundle 3. according to client ...