Perfect for any kind of weather. The unit itself is 20 inch x 18 inch x 17 inch High in size. . Poly-Wood is a high performance wood substitute manufactured from high density-plastic. It consist of high density polyethylene resins select coloring and foaming agents. Poly-Wood is processed into a specification product that closely resembles painted and natural wood products. . ...Poly-Wood absorbs no moisture therefore it will not Rot Warp Crack Splinter or Support bacterial growth.. Poly-Wood is compounded with permanent UV stabilized colors eliminating the need for Painting and Staining Waterproofing Stripping and Resurfacing.