The BERG In Ground Champion 12.5ft Trampoline + Safety Net has been 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 completely covers the springs & round frame. For extra protection the framework has been double coated. This trampoline has Twin Spring Gold Springs, allowing you to jump high & in comfort, these are made from galvanised steel & have a perfect balance between strength & flexibility. Quick & easy to assembled. The BERG Champion 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.