... Process: Pultrusion 3. Sizes: Custom fiberglass rods, fiberglass bar, fiber glass flat rod (FRP Rebar, Fiberglass Rebar, Composite Rebar)Color: Any ... be used in aerospace, sports equipment , transportation , communications , electronics, model toys , building materials , energy, etc. Sizes:1. Regular sizes ... 5x20, 9x3.822. Special Size: 6.35x3.175mm fiberglass rods, fiberglass bar, fiber glass flat rod