1. Strong suction cup, can be filled with water / sand, stable and not easy to fall2. Shock-absorbing springs, effective rebound of about 90 percent3. Boxing speed ball, feel comfortable, soft rebound, hitting silence4. Highly elastic and resistant sandbags, multi-layer leather, flexible rebound any hit without deformation5. Swing arm simulation of real people flexible training, 360 degrees flexible rotation6. Thickened core, resistant to hit without injury to the hand, environmental protection and odorless7. Easy to install, suitable for most of the ground8. Material: steel, PU leather
