5mm fiberglass rods are made primarily from glass fiber, which is reinforced with resin. This combination makes them both lightweight and incredibly strong, often outperforming traditional materials like metal and wood in various aspects. The rods are usually resistant to moisture, corrosion, and chemicals, making them suitable for both indoor and outdoor use. Additionally, fiberglass rods have a low thermal conductivity and can withstand a variety of temperatures, making them reliable in diverse environmental conditions.