This set of umbrella weight plates is designed to securely anchor offset cantilever umbrellas for outdoor use. Crafted from HDPE plastic, each plate features a weather and UV-resistant coating to withstand impacts, regular movement and harsh outdoor conditions such as wind and rain. The four square plates are engineered to fit standard cantilever umbrella cross bases, using interlocking pins to keep the base firmly in place for extended periods without unwanted shifting. Each plate includes a fill spout and twist cap to create a water-tight seal, making the process of refilling, cleaning and storage quick and straightforward. With a maximum capacity of 176 pounds of water or 132 pounds of sand, the set provides a solid, stable anchor to protect umbrellas from accidental falls and weather-related damage. After emptying the plates, the built-in carrying handles make moving the lightweight components simple, with each plate measuring 19.7 inches long, 19.7 inches wide and 3 inches tall. Note that the crossbar base itself is not included with this set of weight plates.