The BERG In-Ground Champion 11ft Trampoline + Safety Net is specially designed to be sunk into the ground & comes with specially designed caps to keep the safety net firmly in place. The extra wide & thick protective edge has been made to completely cover the springs & round frame. For extra protection the framework has been double coated. This trampoline has Twin Spring Gold Springs, allowing you to jump up high; these are made from galvanised steel & have a perfect balance between strength & flexibility. Quick & easy to assemble. The BERG In-Ground Champion 11ft trampoline has been designed for comfort, durability & safety. Suitable for children aged 6+ years We advise that no more than one person at any one time uses the trampoline. We also urge that an adult is present at all times to ensure maximum safety.