Features: Missile-grade enameled silver wire, ultra-low resistivity, small temperature rise and high efficiency. The temperature resistance is 260 degrees Celsius, and there is no fear of burning the FPV racing drone when flying for a long time at full throttle. Ultra-thin silicon steel sheet, imported single-piece ultra-thin non-oriented silicon steel sheet has low eddy current loss and small temperature rise. N52H high performance rare earth arc magnet, thick design. Accelerate soft, and it refuses to freeze, the magnet is thickened and the temperature rise is small, and the motor output power is still strong when flying for a long time at high throttle. Configuration: 12N14P. No.of Cells(Lipo): 3S/4S. Rotor: N52H Arc Magnets. If there are any problems, please contact our store in time. Specifications: Product Name: 3950KV Brushless Motor Configuration: 12N14P No.of Cells(Lipo): 3S/4S Rotor: N52H Arc Magnets Copper Wire: 260 Military Grade Material Shaft: M1.5 Stator: 0.15mm Nippon Stell Silicon Steel Bearings: Japanese NSK 5*2*2.5mm Wire AWG: 24AWG Bell Cap: Al 7075 Base Casing: Al 7075 Prop Shaft : 1.5mm Bolt Pattern: M2 (12X12mm) Weight: 12g with Short Wire Package Information: Package Size: 5*4*2.5cm Package Weight: 58g Gift Box Package Package List: 4* 3950KV Brushless Motor