Evo TS-MI-EVO2280-HP High Power version : 40x109.5mm : 6 Pole Motor.-See picture 2 for motor chart1. Powerful 6-pole core design for high torque output.2. Advanced assembly technology enables more efficient space utilization.3. CNC-machined aluminum casing4. 5. Silver and copper wire alloy for super high efficiency over a basic copper alloy wire. 5. Powerful sintered neodymium magnets6. High torque-to-weight ratio.7. The hand-wound weaving of the winding ensures the motor has excellent electrical characteristics! 8. Includes a free water jacket with an internal water channel to ensure water flows around the motor 9. High-grade bearingsSpecs:Magnets: neodymiumWatts: 9,500Poles: 6Motor Shaft: 8mmShaft Length: 21.5mmCan Measures: 40mm diameter x 109.5mm longWeight: 650GramsMounting Screw diameter required: 4mmBearing size: (front), (rear)Connectors: mm Water Jacket: mm longOSE suggests 30,000-40,000 total rpm. These are only guidelines, we suggest if you don't know how to pick the correct motor, please consult OSE first or other members of the RC Fast electric boating community, either at a local club or on our OSE Forums. * It is important to note that the "Max Amps" value represents the maximum recommended operating current for the motor. It does not indicate the maximum current the motor can draw. For instance, the 1400kv motor has a "Max Amp" rating of 210. This means the motor should not be operated at a current exceeding 210 amps. However, this does not imply that a 200 amp ESC will be compatible with the motor. Instead, the user must select a propeller or gearing that prevents the motor from exceeding its "Max Amp" rating. It is important to note that the 210 amp motor can and will exceed the 210 amp range when pushed beyond its limits, for a short period of time.