High Performance linear actuators are based on the same telescopic push/pull capability as the electric actuator. However, they are often supplied without a motor so that the motor can be chosen to best match the particular application. Servo motors are also common (a servo linear actuator), which enables external control of the movement profile, speed, torque, etc. High Performance linear actuators are available complete with motors offering forces up to 500kN. There is increasing interest in such actuators to replace hydraulic actuators, for the control and environmental advantages that they offer.