"ETTI" B3665 Brushless Motor This is a 4-pole brushless motor! Diameter: 36mm Length: 65mm Motor shaft: 5mm Motor mounting hole: 25mm Kv: 1800 Max. Watt: 1800W/15 sec. Max Amp: 120A/15 sec Max. RPM: 50000 Resistance in Ohm:0.014 Ohm