These sandbags are sturdy construction, durable to add weight, and easy to carry. Can be filled with something; Sand, gravel, even nuts and bolts. A good counterweight to secure your gear will not trip or hit. Used to stabilize totems, tripods, tripods and lighting. Including a sandbag x 3 and a hook x 3. We provide one year warranty and lifetime after-sales service. If you have any problem, please contact us. Specification Materal: nylon Size: 9.84 * 8.66 inch Package Sandbag x 3 Hook x 3