Description: Versatile tool to work the back， lats， shoulders， hamstrings， quads， forearms and triceps as well as the chest 1 rubber spring Each spring is removable to adjust the resistance Robust and sturdy design Ergonomic handles provide a comfortable grip Material: Hose TPR Hose Length: 120CM Hose Diameter: 10.5 * 7 mm Tensile elongation: up more than 3 timesPackage Includes:1 x Muscular Expander