Description: 【 Stability for Outdoor Use】: This fillable sandbag is designed to provide strong reinforcement for feather flagpoles, making it ideal for stabilizing various outdoor items such as camping tents and umbrellas. Say goodbye to instability with this reliable solution 【Canvas Material】: Crafted from canvas, this Weight Bag offers good resistance to wear and tear even in gusty conditions. Its sturdy construction ensures that your flag remains securely anchored without the worry of being blown away 【Size】: Measuring 18 x 19 inches with a hole diameter of 3.15 inches (8 cm), this Flags Sand Bag can hold up to 30 pounds of sand, providing a solid foundation for your flagpole and other items. Ensure compatibility by checking the dimensions of your flag base before ordering 【Convenient and Secure Design】: Featuring an innovative reinforced design, the Canopy Weights Sandbag can be quickly opened and filled, saving time during setup. The secure closure allows for easy transport and repeated use, extending its lifespan significantly 【Scientifically Engineered Support】: Each weight base is meticulously designed based on scientific weight principles to offer reliable support for your feather flagpole. This ensures that every flag stands tall against wind and rain, maintaining its impressive display in any weather condition Specification: 45.72cmx48.26cm/18.00inchx19.00inch Hole Diameter: 8cm/3.15inch Package Includes: 3 Sandbag Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.