Description: 【Easy Clamp On Installation】: The desktop punching speed bag features a convenient clamp design that securely attaches to various surface. Instantly set it up on your desk or table for exercise whenever you need it 【Reinforced High Elastic Spring】: Equipped with a sturdy, upgraded spring, this punching bag offers stable and rapid —up to three times per second. great for intense training, it delivers reliable performance and to help you release tension effectively 【Airtight High Bounce Bladder】: The inner bladder uses advanced reverse pressure sealing technology for good air tightness and elasticity. This ensures optimal bounce and long term durability, giving you a satisfying punching experience each time 【Premium Material Construction】: Made from thickened quality material, the speed bag provides an exceptional hitting feel. The inflatable bladder creates a comfortable and responsive surface, enhancing both your training results 【Fun Fitness for All Ages】: Ideal for both kids and adults, this boxing is a nice tool to improve reaction skills. It’s great for unwinding after work or study Specification: Material: PVC and Metal Clamp Size Chart: ball diameter 17cm/6.69inch height 45cm/17.72inch spring height 12.5cm/4.92inch Package Includes: 1 Desktop Punching Bag with Clamp 1 Inflator Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.