The images and descriptions are of similar products. Please be sure to check the actual photos. Feel free to ask if you have any questions. What is this? Carbon fiber rods are used for quadcopter helicopters, RC airplanes, scale models, handrails, indoor kite making, graphite fishing rod repair, wing and tail reinforcement, RC airplane reinforcement, and more. What's included? Material: Carbon Fiber Diameter: 6mm (0.24") Length: 420mm (16.5") Set of 2 carbon fiber round rods What are the product benefits? Carbon fiber rods use high-tech carbon fiber composite materials. They are ideal for construction where strength is needed without excessive weight. They have high strength, corrosion resistance, surface smoothness, straightness, and stable performance. The specific strength and elastic modulus are actually higher than carbon steel and lighter than aluminum. They have good electrical conductivity and very excellent tensile strength. Decorative carbon fiber tubes also have a 3D effect appearance. How to use it? Carbon fiber rods perform excellently, especially in bending and compression applications. They can be cut to any length. Are there any precautions? There may be a 1-5mm error due to manual measurement. 4071 uxcell Carbon Fiber Rod for RC Plane DIY Tool Wing Tube Quadcopter Arm, Set of 2, Diameter 6mm, Length 420mm