Product Specification? Self-Tightening Propeller(size): Diameter and screw pitch (cm): 24 x 12.7 Propeller Weight (g): 12 (single) Material: ABS plastic Compatibility: DJI phantom 3 series drones Color:White Wide Compatibility These composite propellers are widely compatible with Phantom 3 professional, advanced, standard and 4K Reliable ABS Material Made of highly durable ABS plastic, strong ability of resisting impact, the composite hubs are well manufactured and designed to be lightweight, stable, sturdy and longlasting. User-friendly Propellers The propellers are easy to install and uninstall. Rotate the propellers by hand. The self-tightening propellers will be fixed in the motor firmly and stably. Package includes: 4 x Clockwise Propeller 4 x Counter-clockwise Propeller