USEFUL ALLOY SPRING: The 82B carbon steel spring ensures that the durable spring of our punching bag springs back every time you hit the boxing ball. Rubber suction cups and an ABS pressure valve create a vacuum for secure attachment, ensure stability and prevent accidental detachment during use. High-quality materials: This punching ball is 37 cm high, the ball diameter is 17.5 cm, the base diameter is 18 cm, the ball is made of nubuck PU leather, is highly dense and durable. The top of the sandbag is hand-stitched and has good airtightness to prevent air from escaping during use. Suitable for stress relief: This sandbag has a stress-relieving function and can also alleviate fatigue caused by long working hours. At the same time, our punching bag is suitable for you to release bad emotions and relieve stress when you work for hours, leaving you relaxed and happy. PRACTICAL DESIGN: This table sandbag is equipped with suction cups so you can easily attach it to various surfaces such as wood, glass, tiles or marble. The boxing ring offers you the perfect experience for stress relief. Wide range of uses: This stress-reducing desktop sandbag is often used in homes, offices, schools, etc. to relieve various types of stress. Stress Relief Table Sandbag Sandbag is the perfect tool for adults and children to calm down easily. Useful alloy spring: The 82B carbon steel spring ensures that the boxing ball springs back quickly and is highly durable. High-quality materials: The 37 cm high punching ball made of durable nubuck PU leather with a hand-sewn top prevents air loss. Suitable for stress relief: Ideal for stress management, letting go of bad emotions and finding relaxation after long hours of work. Practical design: Thanks to the rubber suction cups, the sandbag can be securely attached to wood, glass, tiles and marble. Wide range of uses: Perfect for home, office or school, suitable for adults and children to easily relieve stress.