Garelick Active Seat Suspension System Features: Active Seat Suspension Systems absorb and minimize up to 75% of the shock, jolt, and vibration transmitted to the passenger from the forces of roll, pitch, and yaw.; Active Seat Suspensions Systems reduce the feelings of seasickness and nausea by absorbing excessive movement with 1" of damped vertical travel.; These systems are CAD designed, FEA proven, and precision engineered and tooled.; Components are saltwater spray 77000ed and UV stable; to help endure harsh marine environments.; Made from rugged, high-tensile, anodized aluminum with stainless steel hardware.; Standard bolt hole pattern allows for mounting on top of pedestal and beneath any individual seat; Features heavy duty forward hinge system allowing shock absorption to occur in the vertical plane only, eliminates sway and side tipping; U.S. PATENT #6,042,093; Includes provisions for mounting seats with 6" center hole pattern.; Easily mounts to almost any current seat.; Standard bolt hole pattern allows for easy mounting beneath seat to the deck, a box, or the floor of a boat; Perfect for mounting beneath seat greater than 20" (51cm); Includes provisions for mounting seats with 6" center hole pattern; Compact size and low profile design adds only 2" (5cm) of height. The outline is 13" x 7" (33 x 18cm) with standard 5" x 12 1/8" (13 x 31cm) slotted mounting hole pattern.; Installation & Operating Instructions