Carbon Fiber Self-Lock 9450 Propellers Prop For DJI Phantom 2 Vision CW/CCWFeatures:100% new and high qualitySuper light than the plastic one.Fit for DJI Phantom 1/2 /2 vision/ 2 vision+ It is self-tightened. So you don't worry to lost it when your drones are flyingSpecifications:Size: 9.4 x 5.0 inchWeight: 30g (set)Material: Carbon fiberColor: BlackMounting method: built-in lock nut， hand driven installation.Package include:1 pair* 9450 Self-tighten enhanced propellers