Appearance: Laser technology used on the CNC metal spinner surface makes the spiral pattern look real and beautiful. Through advanced processing, the EDF housing and blades surface give you a sense of matt finish. Main Parameter: XFly 50mm EDF with brushless outrunner 2627-KV4600/4S motor: max continuous current is 40A,max thrust is 900g. EDF unit weight 78g.Thus we recommend 40A ESC and 4S battery. Powerful motor: XFLY motor Continuous operation, high temperature resistance,wear resistance and stable,it’s more anti-aging and durable.Premium motor provides stable and balanced operation when in continuous working. The thrust of outrunner 2627-KV4600 motor with high efficiency, combined with optimized design of EDF and blades, can reach 900g when being powered by lipo battery. Design: XFly fans are made of high-quality engineering materials,Sturdy body,stable structure.Removable guide ring design,Adapt to a variety of models.Streamline design combined with CFD simulation analysis can effectively reduce noise and make sound effect more lifelike during high-speed operation. Technology: The combination of high-precision mould manufacturing and advanced injection-molded technique ensures the consistency of fan blades and makes it easier to reach dynamic balance. 0.5mm distance between blades and shell is kept to ensure the best performance., Weight: 0.04850169764 Pounds, Manufacturer: XFly