Actuator Assembly - 13.75" Closed LengthActuator assembly is complete hydraulic cylinder. Piston-like strong arm that pushes tab into position. Sophisticated plastic resin body. Nylon upper hinge. Bends 5° in actual use. Fluid flows through concealed hole in upper hinge thus eliminating external hoses subject to damage. Hearty and flexible enough to demands of offshore use. For use with Bennett standard trim tabs only.