DJI E310 9450 Self-tightening Propellers (Composite Hub, Gray) for DJI Phantom 3 Professional Advanced 1.This OEM propeller phantom 3 made of top quality and durable materials. 2.Self-tightening wholly plastic balanced propeller for DJI Phantom 3 professional 3.The propeller phantom 3 built-in lock nut, hand driven installation. Easy to instal, just put them on and fly. 4.The prop phantom 3 is lighter and stronger than other props, can increase the flying efficiency. 5.Size:9.4x5.0 Package includes: 2 pairs