The fun box features a solid base made of heavy duty welded steel, and it measures 33 by 50 inches. Each wedge ramp comes with a transition plate for a smooth mount from the concrete and steel ramp legs. The fun box tabletop and wedge ramps have a solid wood core and are laminated with metal sheeting on both sides and encased by a welded steel channel. The grind rail attachment measures 4 feet in length and it comes with two height extensions. All steel pieces are galvanized and given a powder coated finish to prevent corrosion and protect against elements. It's easy to assemble with just a few tools (included).