Specifications: Polyurethane is widely used in many fields of national economy because of its excellent performance. Boxing ball uses polyurethane material with a soft and solid structure, free of inflation, can be squeezed and hit, and is very durable. You can adjust the reaction speed of the boxing ball by adjusting the tension of the elastic rubber rope. So, you can adjust the reaction effect of the boxing ball according to your own use needs, which is flexible and changeable. Vacuum suction cup design is easy to carry and suitable for home training. Small size is easy to carry and does not occupy too much space, easy and fast installation. It only takes a moment to install, saving time and worry. This product can both exercise reaction speed, fitness, leisure, entertainment, and can be used as a decompression tool. Item Name: Boxing Speed Ball Material: Polyurethane Features: Portable, Light Weight, Durable Size: Belt Length: 290cm/114.17", Belt Diameter: 0.3cm/0.12" (Approx.) Ball Diameter: 9cm/3.54" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Set of Boxing Speed Ball