Use on:\n•50NX (replacement part)\n•Hawk Pro, Sport, IV, SE, SE v2 (replacement part)\n•All Ravens (replacement part)\n•Falcon SE v2, SE v3, SE (replacement part)\n•Century .50 Scale Helicopters/Mechanics (replacement part)\n•CCPM CONVERSION KIT (CN1061A) (replacement part)\n\nSpecifications:\n•Diameter: 10mm \n•Rotor Head Bolt Hole: 3mm \n•Length: 189mm