Hobby-Ace 24PCS Gemfan 4045 Bull Nose Props Glass Fiber Nylon Propeller CCW CW for QAV250 Multirotor Quadcopter (Black Green and Orange) 4045 Propellers CWCCW for Mini Multirotor Quadcopter like QAV250 H200 H280 etc. Plastic nylon with fiber glass powder,harder than plastic ones,can provide more power than the same type of plastic ones. Well balanced, well-made and durable to sustain crash. More Propeller products are provided by Hobby-Ace on Amazon.Bring your eyes into the sky and racing like a free bird, enjoy the ultimate first person view experience.