InGround trampoline set 223 with safety net This rectangular InGround trampoline from Pro-Line is a popular model because of its size, 305 x 225 x 20 cm. Avyna gives a lifetime warranty on the frame of the trampoline and on the springs 10 years. In other words, with an Avyna trampoline you have quality in your garden. The Avyna Pro-Line trampoline edge completely covers the frame and the double galvanized springs. The edge stays neatly on the trampoline with every jump. The combination trampolines have a safety net, which makes jumping even safer. Prefer a trampoline that is completely buried? Then look at the rectangular FlatLevels, these trampolines do not rise above ground level. Also view our built-up trampolines.