Higoal is the biggest pultrusion FRP square tube manufacturer in South China, being production over 15years ... FRP C channel, Fiberglass angle, I-beam, wide-flange beams, channels, bars, round and FRP square tube, custom shapes are ... tube size.Channel/BeamAngles, I-beam, wide-flangebeams, channels, bars, round, and square Tubes, Custom shapes are available, tooHandleHIGOAL produces fiberglass ...