Jump Around with the Gen II In-Ground Trampoline Kit! This system is built with a focus on creating a long lasting, high quality, trampoline that is specifically designed for in-ground use. The IGT systems will survive all corrosive elements that are exposed to the frame and can handle all climates and conditions. Starting with powder coated corrugated steel wall panels and 15-gauge steel frame tubing; Generation II ensures a long life even in the most extreme conditions. The 12 IGT Gen II system uses 96 6- inch springs, which is the highest spring count in the industry for a comparable size trampoline. The jump surface is a high quality polypropylene mat with galvanized D rings for great performance and long life.