Sturdy Construction: This 64mm EDF ducted fan with brushless motor is made of a combination of composite and metal materials to ensure durability and longevityProduct Dimensions: The duct length is 4.5cm/1.77inch, the diameter is 6.72cm/2.65inch and the fan blade diameter is 6.4cm/2.52inchHigh Performance: Equipped with a powerful and efficient 12 blade fan, this RC brushless motor ducted fan is an ideal choice for model enthusiasts seeking to enhance the performance of their aircraft modelsSmooth : The propeller model aircraft is designed to be stable, easy to dissipate heat, and maintain structural stability during use, providing reliable performance for your remote control aircraftCompatibility: Ducted fan rc plane set specifically compatible for QF2822 2100, 2300, 3300 and 4500KV motors Specification: Material:Metal Size Chart: Tube Length: 4.5cm/1.77inchTube Diameter: 6.72cm/2.65inchLeaf Diameter: 6.4cm/2.52inch Package Includes: 1 RC EDF Duct Fan Set Note: Please allow 1-3mm measuring deviation due to manual measurement.Due to the different and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!