... strength insulation long use life fiberglass square pipe hollow fiberglass pipe is usually used as beam,armrest, ... weight and high strengthUV resistanceCustomizationSafetyInsulationEconomy CharacteristicApplicationfiberglass square pipe hollow fiberglass pipe can be applied as beams,handrail, ... armrest,ladder,measuring instrument etc.Pultruded fiberglass pipe is usually used as beam,armrest,fence,and ...