This is a Coaxial Brushless Conversion Combo for ESKY Big LAMA Series.The 370 size coaxial heli Brushless Combo is designed to upgrade the 370 size brushed coaxial helicopter to brushless power. To perform the upgrade, you will need this Brushless Combo kit, E-Sky EK1H-E020 or similar coaxial heli, double sided tape, cable tights and necessary tools like screw drivers, motor pinion remover, etc. This Coaxial Combo is very easy to repair and install. High quality magnets provide massive torque and linear power. Consistent, high-power output.Time to enjoy the benefit this Brushless Motor brings! You will be amazed at how great it is.