This 20 inches offset umbrella base filled with water sand will be a durable base for your patio umbrella. It is made of heavy-duty HDPE plastic with weather-resistant UV protection that prevents fading and is easy to maintain. It can be filled with 159 lbs of sand or 115 lbs of water, which makes plates offer additional weight to keep your patio umbrella standing perfectly in windy conditions. And it is free from your worry any puff of wind may disturb your summer relaxation in the shade.