This inflatable boxing column is easy to fill water/sand and inflate air to use. It rebounds quickly and softly, suitable for fitness, stress and Taekwondo training. Specifications: Material: PVC Boxing Post Diameter: 350mm / 13.78in Item Height: 1600mm / 62.99in Package Weight: 700g / 24.69ounces Package Size: 200 * 200 * 60mm / 7.87* 7.87 * 2.36in Instructions: 1. Open the bottom plug 2. Fill the water inlet with water or sand 3. Close the inner plug and tighten the outer race 4. Inflate through the nozzle with an air pump Remarks: 1 Be sure to hold at least 7 kg of water, otherwise the column will not stand upright and can easily fall over. 2 As this product is plastic inflatable, please keep away from pointed objects to avoid scratching the air leakage. 3 Do not squeeze hard, children should not sit on it to avoid damage due to excessive pressure. 4 When inflating, just use an appropriate amount. Do not over-inflate to avoid blasting. Packing List: 1 * Inflatable Boxing Post (pump not included)