Non-folding Soft-Bounce rebounder has 36 of our unique soft-bounce springs on a 40" diameter frame. Same style used in Gyms and Health clubs. Needak offers the only rebounders manufactured entirely in the United States of America and pride themselves on setting the "gold standard" as the premier mini-trampoline manufacturer in the industry. Needak maintains high standards of quality control from design to completed product. All Needak rebounders come with a lifetime warranty. for frame. Optional stabilizing bar for beginners, seniors or people with infirmities.