Drone enthusiasts, these FEICHAO carbon fiber propellers are the real deal! Each pair includes one clockwise and one counterclockwise propeller, both measuring 15 inches with a 7.5 pitch. The pure 3K woven carbon fiber construction makes these things incredibly strong and rigid - way better than those cheap plastic props you might be used to. The large tilt angle at the paddle roots enhances overall strength and efficiency, giving you better performance and stability in flight. Weighing in at 20.2 grams per propeller, they're lightweight yet durable enough to handle serious flying. The main hole diameter is 4mm with 3mm side holes and 12mm center distance, compatible with many hexacopter and multi-rotor setups. Each pair undergoes static and dynamic balancing to ensure smooth operation without vibrations that can mess with your flight controller. The precision machining means consistent performance across all your props, which is crucial for stable flight. Whether you're building a new DIY drone or upgrading your existing hexacopter, these props deliver noticeable improvements in lift, efficiency, and overall handling. They're specifically designed for heavier multi-rotor applications where reliability and performance really matter. The carbon fiber material holds up better to impacts and wear compared to cheaper alternatives. Just make sure to balance them properly during installation for optimal performance! For serious RC pilots who want professional-grade components without breaking the bank, these are definitely worth checking out.