Children use it for entertainment, and it can also promote bone and bone growth. Adults use it for buttock lifting, strengthening the body, and strengthening the muscles of the legs, which is a fitness sports product.Main Structure: Iron Pipe + Spring + Jump Cloth + Protection Sleeve + Safety Net . The pipe is made of galvanized steel -- resistant to rust and long service life. .Four-way tube -- Stable, reinforced electroplating, anti-rust. . Spring -- function is to mitigate impact or vibration. Electroplating, anti-rust.
 . Jumping for PP cloth - good elasticity, strong toughness, good breathability, easy to wash, quick-drying. It is resistant to UV, sunscreen, and rainproof.The protective cover is made of PVC -- bright in color, corrosion-resistant, durable, both beautiful and practical.. The protective net is made of PE material -- water-resistant, with sunscreen, windproof and other functions.。Contains related instructions and assembly diagrams, easy to understand and assemble.