ANTUATOR trim tab actuators are precision-engineered to combine quiet operation with a non-hydraulic, maintenance free design. A strong planetary gearbox is used to guarantee the life time of the actuator when a high load on the trim tab.Internal limit switches for both ends as the protection to ensure reliable performance. The unit is totally corrosion free and water proof with IP67M.Unlike hydraulic trim tabs, there is no oil to leak out with ANTUATOR trim tab actuators. 5 years warranty is offered.