The BERG In-Ground Champion 9ft Trampoline + Safety Net is sunk into the ground & comes with specially designed caps to keep the safety net firmly in place. The extra wide & thick protective edge, completely covers the springs & round frame. The double coating on the framework provides extra protection. This trampoline has Twin Spring Gold Springs, allowing you to comfortably jump high in the air, these are made from galvanised steel & offer the perfect balance between strength & flexibility. It is quick & easy to assemble. The BERG In-Ground Champion 9ft 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.