DJI 1242 12" Props Ccw+Cw Carbon Fiber Self-tightening Propellers 2 Pcs for Tuned Propulsion System E600 - Yellow Compatible with DJI Tuned Propulsion System E600 Size (cm): 31 x 11 (12' x 4.2'); Made of strengthen carbon fiber material With the state of the art aerodynamic efficiency and only nearly half of the inertia product of the normal 12' x 3.8' rotor, the 12' x 4.2' rotor offers you an outstanding flight experience The low inertial design enables your flight controller to use a much higher gain value to achieve a higher stability and maneuverability all at once Package included:- Ccw 1242 Self-tightening Propeller x 1- Cw 1242 Self-tightening Propeller x 1