Bennett Trim Tabs Hydraulic Power Unit - 12V Pump. It employs two solenoid valves to direct the flow of fluid to the actuators. The solenoid valves lock tightly to secure the tabs in place. Strength to lower and hold even the largest tabs in place. Lexan cover protects electrohydraulic unit from occasional wash down and translucent reservoir allows fluid check at a glance. Measures 4" x 7 1/2" x 5 1/2". Uses automatic transmission fluid. Includes pump solenoid valves reservoir and cover. Specifications for Bennett Trim Tabs V351HPU1 Hydraulic Power Unit: Manufacturer: Bennett Trim Tabs Voltage: 12 volts Color: Black Package Contents: Bennett Trim Tabs V351HPU1 Hydraulic Power Unit Bennett Trim Tabs V351HPU1: V351HPU1 Hydraulic Power Unit - 12V Pump