Large square umbrella base doubles as a planter box so you can anchor shade and display flowers in one space-saving footprint. The fillable design holds up to 88 lbs to help stabilize 6-10 ft patio umbrellas, while three included couplers fit pole diameters of 1.26, 1.34 and 1.5 in for a secure hold. A built-in 16 x 16 x 13.5 in planter box lets you add soil or decor, and four rolling wheels with reinforced corners make it easier to reposition the stand around your patio.