Three shipping boxes make up this 12-foot trampoline and they may turn up on different days, with the instructions and hardware kit packed in box one. A self-locking system on the net poles cuts the fiddly part of assembly, and the tools needed are in the carton. Galvanized steel springs use a 3 mm wire diameter for a firmer rebound, and the PP jumping mat is breathable, fade resistant and rated for all weather. The mat sits 3 feet off the ground while the enclosure net rises 6 feet, keeping jumpers inside the ring, and foam sleeves cover the poles. A safety pad bridges the gap between mat and frame. Rated to 400 lbs and recommended from age 3, it turns a flat lawn into the main attraction of the yard.