Made with a light weight corrosion proof aluminum frame back and a heavy duty high density polyethylene plastic base. This allows for extreme durability, light weight, and easy installation. Features black powder coated hinges and 30 oz. marine grade UV stable vinyl. High density 4" thick foam provides perfect support and cushioning for those days when the weather gets rough. Color Charcoal/Gray Size 31" L x 18" H x 17.5" D