Perfect for most 430mm up to 600mm sized machines. This is one of the strongest cyclic servos in the world at 208oz of torque, and with all that torque they still have blazing speeds of 0.07, so these mini's have plenty of torque for even a 600 size model! This is a very popular servo for the SAB Goblin Kraken 580, and RAW 580 Helicopters.