JumpSport 550F PRO | Folding Fitness Trampoline | Easy Transport | Professionals Choice | Extra Large Surface | No-Tip Arched Legs | Top Rated for Quality & Durability | 4 Music Workout Vids Incl. 36 EnduroLast-4 cords rated best bounce; club tested for millions of smooth bounces Patented easy-to-adjust bounce tension for individual weight and performance needs; Fast assembly Lifetime Warranty!* Patented No-Tip arched legs provide unmatched stability and safety on our largest frame (44-inch) Integrated Permatron Skirt covers cords for added safety w/ large frame provides 50% more exercise space Patented Steel Reinforced Hinge with lock for no-wobble stability and easy folding and storage.