It&#39;s light, small and portable when it&#39;s not filled with water, and when it&#39;s filled with water, it has weight, which is nice for exercising arm muscles.<br/>Features:<br />The use of this water-filled dumbbell is special and practical, and the weight can be adjusted because the volume of water is controllable, depending on your needs.<br />Weight bag using fine quality PPC material, with nice sealing, no leakage, practical. And because it&#39;s soft, you won&#39;t hurt the floor when you drop it to the ground.<br />The detachable design is convenient for assembly and use, and is convenient for air bleeding to be carried or stored. It is equipped with the necessary accessories.<br />The set of fitness equipment can help you build fine physical, portable, and space-saving, and can be placed at home or in the office for personal training.<br/>Specifications:<br />Color: blue, balck (optional)<br />Material: PPC<br />Package size: 320 * 110 * 100mm / 12.6 * 4.3 * 3.9in<br />Package weight: 766g / 1.7lb<br/>Packing List:<br />4 * Dumbbell Bag (without water)<br />8 * Screw<br />2 * Leverage