Feature: 1. Extremely Thin: The propeller is carefully optimized and the propeller is calculated by computer to make the blade thickness extremely thin. 2. High Efficiency Operation: Reduce the power absorption of the motor, thus ensuring high accuracy and high efficiency operation in use. 3. High Torsional Rigidity: All propeller blades are made of carbon fiber with very high torsional rigidity. 4. Applicable Scene: Suitable for fixed wing, suitable for common installation size of various brands of motors. 5. Perfect Replacement: Using sophisticated production techniques, this RC propeller is the perfect RC replacement accessory. Specification: Item Type: RC Folding Propellers Material: Carbon Fiber, Aluminum Alloy Product Length: Approx. 235mm / 9.3in Adapter Ring Inner Diameter: Approx. 5mm / 0.2in Middle Hole Diameter: Approx. 6mm / 0.24in Middle Big Hole Diameter: Approx. 9mm / 0.4in Applicable To: Fixed Wing, Suitable for General Installation Size of Various Brands of Motors. Package List: 1 x RC Folding Propeller1 x Adapter Ring Note: 1. Please allow 1‑3mm error due to manual measurement. Make sure you don't mind before ordering2. Due to different shooting lights, as well as differences between monitors, the pictures may not reflect the actual color of the object. Please make sure you don't mind before ordering, thanks!