Pro-Line trampoline set for InGround 238 This large rectangular InGround trampoline of 380 x 255 x 20 cm can rightly be called a serious trampoline. The trampoline edge stays neatly in place with every jump and covers the springs, making it safer for the jumper. The Avyna Pro-Line rectangular InGround trampoline set meets all safety requirements and has been tested as the best. We provide a lifetime warranty on the frame and a 10-year warranty on the double galvanized springs. A safety net is also possible with an InGround trampoline. Do you want to make the jumps even safer? Click here for our InGround combination packages. These are trampolines including a safety net. and free stairs. Avyna Pro-Line FlatLevel trampolines, completely flush with the groundCurious about our FlatLevel trampolines? View the FlatLevels here. Also view our built-up trampolines.