Bennett actuators are strong but flexible nylon/fiberglass hydraulic cylinders. The piston-like arms push tabs into position. Fluid flows through a concealed hole in the upper hinge at the top of the actuator, thus eliminating external hoses that can be subject to damage. 

A1101CPEIC15 – Standard Length Hydraulic Actuator Hydraulic. Measures 13 – 3/4″ (2.5″ Stroke), for Bennett EIC indicator control switches. 15 feet of cable.