The relative density is between 1.5 and 2.0, which is only 1/4 to 1/5 of carbon steel. However, the tensile strength is close to or even exceeds carbon steel, and the specific strength can be compared with high-grade alloy steel. Therefore, it has excellent results in aviation, rockets, spacecraft, high-pressure vessels and other products that need to reduce their own weight. The tensile, bending and compressive strength of some epoxy FRP can reach more than 400Mpa. Fiberglass Rod Diameter Weight Diameter Weight mm inch g/m lb/ft mm inch g/m lb/ft 2 0.079 6 0.004 17.5 0.689 481 0.323 3 0.118 14 0.009 18 0.70…