Features: The 9450 propellers provides thrust and better power efficiency than the older one, making the quadcopter achieve significantly higher lift and thus more powerful. Durable and easy to use product. Higher tension, easy to install The positive propellers are marked with L on the blade and need to be installed on the motor that rotates counterclockwise (the self-locking motor is white headed) The anti-propellers are marked with R on the blade and need to be installed on the clockwise rotating motor (the self-locking motor is black headed) Specifications: Material:ABS Model: 9450 Color:White,Black,(Optional) Length: 9.4inch or 24cm Pitch: 5.0mm Compatible with: for Phantom 2, Phantom 3(3A 3P) Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2Pair 9450 Propellers