The BERG Champion 9ft Trampoline + Safety Net has an extra wide & thick protective edge, completely covering the springs & round frame. The double coating on the framework provides extra protection. This trampoline has Twin Spring Gold Springs, allowing you to jump high & in comfort, these are made from galvanised steel & has a perfect balance between strength & flexibility. Quick & easy to assemble. The BERG Champion trampoline has been designed for comfort, durability & safety.13 Years Warranty on Frame Suitable for children aged 6+ years The trampoline should be placed on a flat, soft surface. 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.NB: Ladder not included