Choose our Maypex's Brand quality assurance products will never disappoint you. They are the best ideal for both residential and commercial location, our product will definitely match any of your outdoor, patio and garden. This water filled umbrella base is made from plastic in a square shape that's designed to evenly distribute weight and keep your umbrella firmly in place on your patio or deck. A hole on top lets you easily fill it with water as a counterweight, while a cap keeps the closure secure as you move the base around for optimum shade coverage. The opening at the top is compatible with market umbrellas that have a pole with a diameter of 1.5".