【Strong And Durable Material】- Our punching speed bag is made of PU leather and high-quality metal materials, using 2mm thick polyurethane, pure sponge solid ball design. Waterproof and rustproof, easy to clean, make it more durable and longer service life. After tens of thousands of punches, it is still as strong as a new boxing ball. 【Reinforced Spring & Large Capacity Base】- Our free standing boxing ball uses a more high-quality and durable spring to ensure that it can quickly return to the original position after each boxing. he punching bag come with a highly durable stand and a heavy-duty base, held securely in place by filling it with 30kg water or sand. Not only can it be used indoors, but it can also be placed outdoors to start boxing with family and friends. 【Height Adjustable】- This is a height-adjustable Punching Bag. The adjustable range is 53.5~60.6inch (136~154cm). It can be adjusted to the most suitable height for the user's height. Whether it is a child or an adult, you can quickly use it to start boxing training. Suitable for all ages. Experience the joy of boxing with your family! 【A Must For Stress Relief】- This is a free standing punching ball that you should not miss. Punching ball training allows you to instantly release the pressure accumulated during your day's work and quickly relax yourself. It can not only exercise muscles but also improve attention, agility, speed and hand-eye coordination. What are you waiting for? Start a passionate boxing training right away. 【Easy To Install & Use Quickly】- Follow the installation instructions, can be installed soon, and you can start boxing training at home like a professional boxer. Fill the base with water or sand and place it in any suitable position for use. It is extremely stable to use.. Next is your time to enjoy boxing.