Avyna trampline set 12 If you choose an Avyna Pro-line round trampoline set 12 with a diameter of 365 cm, you choose the highest quality and safety. Our trampolines have been tested as the best and meet all safety requirements. For extra safe jumps, order a safety net. Click here for a built-up trampoline including net. Unlike other trampoline brands, we give a lifetime warranty on the frame. This surface-mounted trampoline is equipped with an extra thick and sturdy safety pad that covers the double galvanized springs. Would you rather dig in your trampoline? Then you can also choose a round InGround, which rises 20 cm above the ground, or a round FlatLevel that is equal to ground level.