Precise details: Description: Brand:SunnySky Model: X2216 Motor KV (rpm/v): 1100KV, 1250KV,1400KV,1800KV (optional) Stator Diameter: 22mm Stator Thickness: 16mm Rotor Diameter: 27.5mm Shaft Diameter: 3.175mm No.of Stator Slots: 12 No.of Rotor Poles: 14 Body Length: 36.5mm Body Length (Without Shaft): 34mm Max Lipo Cell: 2-4S Features: X series of motors are processed by CNC milling, the hollow-designed appearance not only guarantee good heat dissipation, but also greatly reduce motor weight. In addition, it also make motors look more strong at visual. Stainless steel solid shaft The motor shaft is made of 420 stainless steel material imported from Japan. After heat treatment, the shafts are improved to high strength, excellent ductility, and better resistance to bending and breaking. 6061T6 Aviation aluminum alloy Top and bottom caps are made of high strength 6061T6 aviation aluminum alloy, with high hardness and high strength of extension, which can ensure reliable performance of motors. Imported NMB bearings X series uses customized NMB mini bearings imported from Japan, which provide longer life, quiet and stable operation of these motors. Hand wound The coils of X motors are all hand wound. This manufacturing procedure costs much more in labor, but makes the coil tight, neat, better coil space factor, and can increase the continuous power output of motors. Package Included: 1 x SunnySky X2216 Motor