Best Choice Products 4-Piece 155lb Capacity Heavy-Duty Cantilever Offset Patio Umbrella Stand Square Base Plate Set w/Easy-Fill Spouts for Water or Sand – Black

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STURDY 4-PLATE DESIGN: Made with interconnecting pins to lock your umbrella base in place and secure it for hours of enjoyment (Note: Crossbar base not included)
EASY-TO-FILL SPOUTS: Each plate is built with a fill spout and a twist cap to create a water-tight seal for quick and easy refills, ballast disposal, and relocation