✔ High strength material, The new four-axis aircraft frame arm using PA66 + 30% ultra-high strength material, impact resistance, impact resistance<br><br>✔ PCB board connections,the main use of the integrated PCB board connections, with gold-plated high-strength composite PCB circuit boards, power supply, power transfer and other connections faster and more secure; The new four-axis aircraft ladder using non-standard M2.5 screws, enabling the PCB and the arm is securely attached<br><br>✔ The motor mounting position, the new design of the sinking of the motor mounting position, lift the PCB location make the new four-axis aircraft center of gravity lower and more stable<br><br>✔ Installation space, Optimized design large installation space, providing ample mounting space for a variety of flight control systems<br><br><br><strong>✔ Package Included:</strong><br>   6 x Flame Wheel (2 Red, 2 White),<br>   1 x F450 TOP Plate<br>   1 x F450 BOTTOM Plate<br>   16 x F-M3*8 Screws<br>   24 x F-M25*8 Screws