This umbrella base is perfect for securely supporting your cantilever patio umbrella. This fillable base is meant to be used with offset or cantilever umbrellas with a crossbar base. Each plate features a spout to help with quick and convenient filling with sand, as well as easy cleaning and storage. The plates are made of sturdy high-density polyethene (HDPE) plastic and can hold up to 24.95kg of sand for a total of 99.79kg to ensure your umbrella will stand up to the wind and elements. With a convenient foldable handle on each plate, they are easy to move and position after they are filled.