The heavy duty actuator features a reinforced upper mounting boss and a 12 gauge stainless steel upper bracket. Lectrotab heavy duty trim tab actuators are precision-engineered to combine quiet operation with a non-hydraulic, maintenance free design. The unit is corrosion free, ensures very accurate tab positioning, provides maximum lift force, and is totally self-contained for easy installation. The actuator assembly is packaged in a non-metallic permanently sealed housing. No components need to be installed inside the boat. Most importantly, unlike hydraulic trim tabs, there is no oil to leak out. The actuator incorporates a standard or low profile transom mounting bracket. Actuators come in 12 and 24 VDC with 8 second recommended stroke time.