Inground trampoline set 12 The trampoline set 12 has a diameter of 365 cm and rises 20 cm above the ground so that you can get on and off the trampoline easily and safely. If you want a trampoline completely level with the ground level, then we have the FlatLevel trampoline. Apart from the fact that an InGround trampoline is nicely integrated with your garden, the trampoline is also safer due to the low entry and exit. For optimum safety, we also recommend installing a safety net. Click here for a round InGround trampoline with safety net. Avyna Pro-Line trampolines have a sturdy edge that completely covers the springs and the frame, even while jumping, so you can jump safely. We give a lifetime warranty on the frame and on the double galvanized springs for 10 years. Have someone else dig in? We have developed the trampoline in such a way that digging in is not very difficult, but do you want to outsource it? Take a quick look here if you could help. They have experience in burying an Avyna tampoline.