Products formed by one-time pultrusion from glass fiber and its products as reinforcing materials, calcium powder as the filling agent, and synthetic resin as the matrix material.

Glass fiber reinforced plastic (GFRP) sign posts are extruded from FRP profiles, utilizing glass fiber and its products as reinforcing materials, calcium powder as a filler, and synthetic resins as the matrix material, which are formed into a single piece through a GFRP extrusion machine.