Rolling Fillable Patio Umbrella Base with Foldable Pull Rod & Hidden Wheels, Heavy Duty Water Sand 74842921Foldaway Pull Rod System: This patio umbrella base glides from poolside to deck with an adjustable pull rod that is telescopic, rotatable, and foldable for flexible positioning and compact, out of the way storage. 2 rolling casters keep movement smooth, including 2 hidden universal wheels that flip up when the rod is unfolded. Ultimate Stability Options: This fillable umbrella base ensures stability and safety by filling up to 100 lbs with water, 158