Feature:1. Aluminum Covers and Copper Coils: CNC machined aluminum front and rear covers. High purity and high temperature resistant copper coils effectively provide high efficiency.2. Output Shaft and Bearing: The motor uses high toughness stainless steel output shaft, high accuracy high quality bearings make the motor super durability.3. Balanced Rotor: Precisely balanced rotor, providing high smoothness, reliability and maximum speed. And the motor size is 42.3x42.5mm or 1.665x1.673in.4. Applicable Model: QA4220 450KV brushless motor is suitable for RC airplane fixed wing, can effectively improve the performance of your RC airplane.5. Product Parameter: Maximum continuous power or 10 seconds(W) or 10S is 1100W, maximum continuous current(A) or 10S or 10 seconds is 60A.Specification:Item Type: QA4220 450KV Brushless MotorMaterial: Aluminum Alloy and Copper and Stainless SteelSpeed: 450KVConfiguration: 12N 14PMotor Size (Diaxl): Approx. 42.3x42.5mm or 1.665x1.673inNumber of Lithium Batteries: 3-6SMaximum Continuous Power or 10 Seconds (W) or 10S: 2000WMaximum Continuous Current (A) or 10S or 10 Seconds: 80AAppliction: for Remote Control Airplane Fixed WingColor: As Pictures ShownWeight: Approx. 346g or 12.2oz.Package List:1 x Motor8 x Screw2 x Accessories3 x Banana Head Female1 x Nut3 x Rubber Sleeve1 x ManualNote:1. Please allow 13mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.