Height-adjustable. Horizontal bar and flexible, and to ensure that no rupture, the anchor position, the pillars, and the degree of tension cable tension strict compliance with standards to ensure uniform elasticity. Horizontal bar to column connections are slipknot to ensure the effectiveness of its elasticity. Equipment to ensure overall stability. Bars made of high strength high-quality stainless steel, advanced processing technology to ensure that bars people out good elasticity, toughness and bending strength, athletes maximize motion technology. Hand wheel locking device can locate bars at 2300mm - 2550mm height adjustment within a range of users with different needs competition and training.