1. Real machine mold opening does not affect flight, does not affect the flight and use of drones. 2. High-strength PC material, high toughness, anti-bending and more . 3. design, only 12g per piece, does not affect flight. 4. Easy installation, pay attention to the installation to distinguish the front positive and reverse blades. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color: Black Material: PC Package Contents: 1 * Drone Propellers Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.