Tough, UV-stabilized polyethylene seat is now made with superior SURPASS resins for excellent strength. Molded for comfort with removable, marine-grade vinyl cushions. Includes 15"H anodized aluminum pedestal, a poly mounting plate and an anodized aluminum spider with 360 rotation. Gimbal not included Complete chair package is easy to install Application: Flybridge, cockpit Frame Material: High-performance SURPASS resins for strength Upholstery Material: Marine-grade vinyl Chair Dimensions: 18 1/2"H x 20 1/2"W x 17"D Mounting Hardware: Included; anodized aluminum and stainless steel Pedestal Material/Finish: Anodized aluminum Pedestal Dimensions: 15"H x 2 7/8"dia. Adjustment Method: Adjustment knob Base Material: Almag 35 aluminum Base Diameter: 9" Warranty: One year