Features 1、With Steel Spring: This boxing punch ball has steel springs, with 90 percents strong rebound, and it also has strong suction cups for good stability. 2、Thickened PU Leather: The boxing punch ball is made of thickened PU leather, and the inner part is aerated. It has a good feeling of hitting. 3、Large Ball Diameter: The desktop punching bag is designed with a large ball diameter. The diameter of the inflated ball is 20cm, making it more comfortable and playable. 4、Wide Use: The desktop punching bag is widely used as children's toys, adult pressure relief appliances, sports equipment, etc. 5、Note: Before adsorption, please wipe the bottom of the suction cup and the adsorption surface with a wet cloth for better adsorption effect. Item Type: Desktop Punching Bag Material: PU Gross Weight: 620g/21.9oz Diameter of Inflated Ball: 20cm/7.9in Package List 1 x Desktop Punching Bag 1 x Air Pump 1 x Inflating Needle 1 x Base 1 x Suction Cup Cover 1 x Spring 1 x Gasket 2 x Washer