372104 Title: DJI Self-tightening Propeller 2CW+2CCW for Phantom 3 Quadcopter Version Original Part 9 Series: Phantom 3 Quadrocopters Type: RTF Self-tightening design keeps the propellers securely to each motor Durable plastic construction provides both lightness and rigidity Self-tightening design， simply rotate the propellers by hand to attach or detach. Size: 24*12.7cm Basics: each propeller weights 13g Package: 2 Pair Propeller