Higoal is the biggest pultrusion FRP square tube manufacturer in South China, being production over ... wide-flange beams, channels, bars, round and FRP square tube, custom shapes are available, too. Profiles can be used ... to wall thickness. Please inquire for a specific rod or tube size.Channel/BeamAngles, I-beam, wide-flangebeams, channels, ... inquire regarding a specific requirement. FRP square tube