After having to pull our poolside umbrella out of the pool one evening we knew we needed a heavier base for our poolside umbrella.  This base weighs in at over 38 pounds so we used a dolly to move it to where we wanted it.  There are multiple size rings where the umbrella pole is inserted for you to select the right size for your umbrella.  We removed the smallest ring.  Much nicer looking stand than the water filled base we replaced!