1、Feature: The extremely thin blade thickness reduces the power absorption of the motor, thus ensuring high precision and high efficiency in use. 2、High Efficiency Operate: Smaller tip area and bigger root area helped to get the optimized moment of inertia while remain the equal thrust output. 3、Quick Response: The prop shape was designed based on power dissipation, thrust, efficiency and moment inertia of a propeller, so the responsive speed could be more sensitive. 4、Material: It uses high strength carbon fiber material, more powerful, rigid, lighter in structure, fatigue resistant, intensity and good endurance. 5、Important Parameter: The product length is about 455mm, the inner diameter of the adapter ring is about 5mm, suitable for a variety of brands of motor universal installation size. Item Type: Fixed Wing Propeller Material: Carbon fiber, aluminium alloy Length: Approx. 455mm/17.91in Adapter Ring Inner Diameter: Approx. 5mm/0.20in Smaller Hole Diameter: Approx. 6mm/0.24in Larger Hole Diameter: Approx. 9mm/0.35in Application: Suitable for a variety of brands of motor, universal installation size fixed wing 1 x Propeller 1 x Adapter Ring