Description One pair 5X4 5040 Multicopter CW CCW Propeller QAV250 and QAV280 frames and general airplane multirotor uses. Features Well balanced from  factory provide excellent and smooth power Specifications Size : 5 *4.0  pros Length: 5 inch (127cm) Weight : 2.2 g (single propeller weight) Center Hub size : 5.0mm Accessories : none Package Includes 1pc CW 5040 Propeller 1pc CCW 5040 Propeller