Hightlights Self-tightening design keeps the propellers securely to each motor Compatible with Phantom 3 series Durable plastic construction provides both lightness and rigidity Overview Self-tightening design, simply rotate the propellers by hand to attach or detach. One pair of propellers: 1 clockwise and 1 counter-clockwise propeller. Basics: each propeller weights 13g, diameter and screw pitch is 24×12.7cm. Compatibility Compatible with Phantom 3 series A set of two propellers. Includes one clockwise replacement propeller and one counter-clockwise replacement propeller.