MAD 3506 EEE Drone Brushless Motor (2PCS INCLUDED).MAD 35 Series motors are the classical UAV motors for small to medium industrial use, efficient and for endurance flight. These sizes of motors have been releasing in the market for 10years, MAD Components optimized them to be very lightweight design.ENTHUSIASTS EXTREME EDITION for extreme weight reduction while maintaining the highest possible performance.Open body design for better passive heat dissipation.Propeller installation compatibility.Reduced motor weight.Motor mounting holes standarization. KV Option:400KV 460KV 650KV