Be able to enjoy your patio furniture during any time of day with help from this Resin Umbrella Base with Filling Cap (986021). This base is brought to you by Grosfillex, a leading brand in outdoor furniture. With a 13” stem and a diameter of 21”, this base fits any umbrella pole with a diameter of 1 ½ inches. You are also able to add weight support to this base by filling it with sand or water through the filling cap. Thumb screws are included with this model for easy insertion of your Grosfillex umbrella.