This product is a set of five 1-meter long carbon fiber square tubes with a 5x5mm size and 3.5mm round hole, specifically designed for RC airplanes. Originating from China, these high-quality tubes are perfect for adding strength and durability to the construction of model airplanes, ensuring a stable and reliable flying experience for enthusiasts. With the carbon fiber material and precise measurements, these tubes are an essential component for creating a successful RC airplane project.