18" stroke length 36v Heavy Duty Actuator for use with prime focus satellite dishes of up to 8' Specification: Model HEAVY DUTY ACTUATOR (HV) Input 36VDC Load Capacity 4500N Stroke Length 450 mm, 18" Drive ACME Full Load Speed 4.2mm / sec Duty Cycle 20% Temperature -26?C~65?C(-15?F~150?F) Limit Switch Adjustable Sensor Reed Switch Sensor Static Load 9000N