HIGH STRENGTH MATERIAL - These empty sand bags are woven with high quality polypropylene. Each sandbag is 60 grams and used for flood control, using a higher density material to improve toughness. They will not easily leak its contents and are strong enough to withstand heavy loads. | WELL SEWN - The edges and bottom of the white sandbag are sewn with double reinforcement, which greatly enhances the strength and toughness of the bottom and is not easy to crumble. They are tear resistant, providing you with longer lasting use. | LARGE QUANTITY - There are 40 unfilled sand bags that are ready to use. This is enough quantity to meet your various purposes. Available in large size of 18 x 30 inches, these woven polypropylene sandbags are designed for light to medium duty. | EASY TO TIE UP - The package also comes with 20 meters of ties. Use the included ties to bind them securely when the bags are filled, making it easy to stack sandbags quickly. It is especially suitable for projects that require a large number of barrier sandbags. | MULTIPLE USES - Polypropylene sandbags are widely used for various purposes such as flood protection, traffic control, hurricane protection, roadblocks, emergency situations, landscape construction, building construction sites, etc.