The BERG InGround Champion 9ft Trampoline + Safety Net is sunk into the ground and comes with specially designed caps to keep the safety net firmly in place. The extra wide and thick protective edge, completely covers the springs and round frame. The double coating on the framework provides extra protection.This trampoline has TwinSpring Gold Springs, allowing you to comfortably jump high in the air, these are made from galvanised steel and offer the perfect balance between strength and flexibility. It is quick and easy to assemble.The BERG Champion trampoline has been designed for comfort, durability and safety.13 Years Warranty on FrameSuitable for children aged 6+ yearsWe 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.