Stop chasing tipped patio umbrellas across the yard with this set of four heavy-duty Hdpe base plates engineered specifically for cantilever and offset umbrella stands. Each plate fills quickly through a generous spout, holds up to 5.2 gal of sand for serious ballast, and stacks flat in the off-season so storage stays painless. Built-in handles make repositioning around the deck or pool deck almost effortless.