Description 1. Mount and use the propellers strictly according to the user manual. 2. If the propellers become deformed or damaged during use, they should be replaced promptly. When replacing propellers, be sure to simultaneously replace the corresponding washers and screws. Do not reuse them. 3. Please use the propellers from the same package and do not mix them with propellers from other packages. 4. Do not scratch the surface of the propellers or touch them directly with your fingers. Do not use oil-based or alcohol-based solvents to clean the propellers, as this may damage the anti-icing layer on the surface. 5. After 450 flights with the anti-ice propellers, it is recommended to replace the propellers to maintain good anti-ice performance.