The chest expander is made of premium elastic material. It is perfect for muscle training indoors, exercise arms and maintain good health. In general, it builds the muscles of the chest, latissimus , shoulders, triceps. It is lightweight, easy to transport and store, you can exercise at home or in the office. Features - - Material: TPE + Rubber. - Size: 45 x 10 cm. - Reduces stress on wrists and forearms, compared to most other chest exercisers. - Ergonomic anti-slip handles provide a comfortable grip. Rubber resistance bands easily added or removed with a snap for adjusting the strength level. - Specially strengthen your chest, arms and shoulders. Overhead pull down helps broaden upper back. - The gap between the springs is tight, and can withstand a strong traction force and adapt to various strength training. - Lightweight, easy to transport and store, you can exercise at home or in the office. - Warm Tip: Dear buyer, Due to lighting effect,monitor’s brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package list: 3 x Chest Expander