Manufactured with heavy-gauge reinforced stainless steel and powerful hydraulic actuators, with a sophisticated black-powder-coated finish. Performance Tabs combine strength, durability, and good looks to achieve your boat?s maximum potential. Kits Include: (1) Helm control, (2) trim plane assemblies, (2-4) hydraulic actuators, (1) hydraulic power unit, hydraulic tubing and hardware. Description w/OBI9000H Control Span x Chord 12" x 9" Actuator Single Boat Size Under 21'