Happycat 8 Pair 6045 6.0*4.5 Inch Black Propeller CW/CCW---Drone Replacement Spare Parts Prop For QAV250 ZMR250 RC Quadcopter (Black) Suit For Multicopter,Great Propellers For QAV250 ZMR250 RC Quadcopter Well balanced, well-made and durable to sustain crash Package Content: 8 Pair Propellers (Black,Length: 6.0 inch,Screw Pitch: 4.5 inch,Central Hole: 6mm) Durable, not easy to damage With stable performance High hardness and elastic deformation is very small, which can increase the flexibility of the aircraft, stable connection, easy to install, good for each blade.