GoolRC 2 Pairs 5030 5*3 Carbon Fiber 3-Blade Propeller Prop CW/CCW for QAV250/280 H250 Multirotor Quadcopter Material: Carbon Fiber Suit for: QAV250/280 H250 Multirotor Quadcopter. Center hole diameter: 5mm Screw pitch: 3.0 Length: 5.0 inch