Square pultruded tube is a form of composite material that combines the light weight and flexibility of plastic with the strength and durability of fibreglass. Fiberglass reinforced plastic and a resin matrix are combined to create the tubes, which are then heated and pressed through a die. As a result, a material with a square cross section that is rigid and strong can be produced for use in a variety of industrial, engineering, and building projects. The square pultruded tubes are strong, lightweight, stiff, and resistant to corrosion. Their non-conductive nature makes them perfect for electrical equipment and insulation.