A2212 is a brushless out runner DC motor specifically made to power Quadcopters and Multi-rotors. It is a 2200kV motor. It provides high performance, a superpower, and brilliant efficiency. These motors are perfect for medium size quadcopters with 8 inches to 10-inch propellers. Use this to build powerful and efficient quadcopters. Perfect with our F450 quadcopter frame. Our 30A ESCs can be used to drive the motor. BLDC Features : The steel design is capable of withstanding competitional conditions. Lightweight design makes them suitable for a wide range of Quadcopter and Hexacopter Frames. Compact size. Offers great performance and value for money. Smooth throttle response for best RC experience. Physical Specifications: Length 43.5mm with shaft Diameter 28.5mm Shaft Diameter 3.17mm