Happycat 4 Pairs Carbon Fiber 1045 CW/CCWPropeller Prop ---Drone Replacement Spare Parts Prop For Mini QAV250 RC Quadcopter Black &Green Suit For Airplane, Helicopter,Great Propellers For RC Quadcopter Well balanced, well-made and durable to sustain crash Package Content:4pcs 10 x 4.5L Propeller, 4pcs 10 x 4.5R Propeller (Carbon Fiber and Nylon,Length: 1.0inch,Diameter of Shaft: 6.0mm,Thickness of Center: 10mm) 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