Simple system to improve ride and efficiency. Bennetts new Self-Leveling Tabs (SLT) simplifies trim tab operation and installation by using a spring loaded actuator. This design eliminates the hydraulic lines and wiring required of more complex systems. Ideal for boats longer than 17', the actuators have are pre-set with a 90lb. spring that responds to both boat speed and water pressure to provide trim precisely as needed to improve your hole shot, reduce engine laboring, improve fuel efficiency and eliminate porpoising. Each unit includes two 10" x 10" 14-gauge 304 stainless steel trim tab assemblies with Bennetts exclusive interlocking hinge, fully automatic actuators, and a complete set of stainless steel mounting hardware. Install a simple trim tab system and improve the ride and efficiency of your boat with a Bennett SLT trim tab kit. Key Features: Simple trim tab system that does not require hydraulic or electrical installations Pre-set spring loaded actuators respond to boat speed and water pressure to eliminate porpoising Helps boat get on plane faster Ideal for lighter boats over 17' Five-year warranty Installation Instructions/Owners ManualKit Includes:Two 304 stainless steel trim planes with interlocking hingesTwo 90lb fiber reinforced actuatorsMounting hardware