Description: The 9455S propellers have a whole new aerodynamic design giving the phantom 4 series an impressive noise control performance. When used with the phantom 4 pro v2.0, up to At 4db (60%) of plane noise is lowered during takeoff and landing. Noise reduction is also improved when used with the phantom 4 pro, but not as much. This is not the propellers of DJI origin, but the actual effect of use are the same as the original, therefore profitable. Characteristics: Diameter wire: 9.4x5.5 inch (24 13.97 cm) Weight: 28 g/pair Suitable for Dji Phantom 4 Serials: For Phantom 4 Pro V2.0 For Phantom 4 Pro for Phantom 4 Advanced For Phantom 4 Advanced + Package included: 1 pair * propellers