300 size brushless motor with neodym magnets, dural case with cooling fins and unique solder posts for easy wiring is manufactured using modern technology from the finest materials. The motor is especially designed for ducted fans of 55 - 65 mm but it is also suitable for models of 400 - 480 size up to 950 g in weight. This motor is two pole, high RPM, and use with the VMGM planetary gearbox is highly recomended.