Features: 4 poles, 12 slots, and high torque.CNC machined 6061-T6 aluminium cooling fin leads to efficient heat dissipation. Secondary oxidation treatment makes it exquisite and durable.High purity copper windings maximizes efficiency, with high temperature resistance. High-speed ABEC5 bearing is precision and stably, with low friction, good durability.4mm gold plated connector, 5mm shaft, install it with M3 screw.Balanced and smooth rotor can get best reliability and maximum RPM. Also, rotor is removable and replaceable.Ultra-thin silicon lamination behaves high magnetic permeability, good insulation and heat resistanceMotor is waterproof and compatible with RC boat whose length is about 100cm, weight is 4-6 kilograms.Specification: Material: MetalColor: Shown As PicturesWeight: 420gType: RC Model Part & AccesPackage List:1 * Motor