** Delivery and Installation Availiable within 20km of our store.*$250+ GST** Thunder and Thunder Pro use the unique Vuly Leaf Spring system. These models remove all coils; there's nothing for little fingers to get caught in on the inside or the outside of the trampoline. Leaf Springs also create a gentle edge around the rim that’s totally safe to land on, and unlike other trampolines with no coil springs, they don't use fibreglass bands that clamp together while bouncing. This makes onlookers even safer! For families that want the safest and best bounce in the most advanced design, choose Leaf Springs.