... Fillers 2. Process: Pultrusion 3. Sizes: Custom fiberglass rods, fiberglass bar, fiber glass flat rod (FRP Rebar, Fiberglass Rebar, Composite Rebar ... :This series of products can be used in aerospace, sports equipment , transportation , communications , electronics, model toys , building materials , energy, etc. ... .822. Special Size: 6.35x3.175mm fiberglass rods, fiberglass bar, fiber glass flat rod