Autel Robotics Propellers for use with X-Star and X-Star Premium Drones, Black Product Features Two self-tightening propellers (Black) Package includes one red-topped propeller and one silver-topped propeller Compatible with Autel Robotics X-Star and X-Star Premium Propeller dimensions are 9.4″x5.5 Degree Original Autel Robotics parts Product Description Two self-tightening propellers (black) for use with Autel Robotics X-Star and X-Star Premium Drones. Package includes one red-topped propeller and one silver-topped propeller.