Skywalker Trampolines Square Trampoline and Enclosure with Spring Pad Galvanized steel interlocking frame Heavy duty Camouflage spring pad Patented gap free enclosure design Total of 96 thick steel springs Meets or exceeds ASTM safety Standards Galvanized steel interlocking frame Heavy duty Camouflage spring pad Patented gap free enclosure design Total of 96 thick steel springs. Recommended for ages 6+ Meets or exceeds ASTM safety Standards