Suggested Retail:$56. Elite Shade Umbrella Base Water & Sand Filled Stand Market Patio Outdoor Heavy Duty Umbrella Holder(Black).. Hand-turn Knob to Fix the Umbrella: The round umbrella base water filled design of this product is big enough to hold the umbrella, features two hand-turn tightening knobs for securing the umbrella to the base. Double lock design, one hole inside and one knob outside which could fix your umbrella tight. Plastic inserts on top of steel pipe fit for Φ1.5" (38mm) or Φ1.9"(48mm) umbrella poles. Rust Proof and Anti-corrosion Material: Made of durable HDPE material, all weather resistant, steel pipe and would not be corroded easily.It has good solidity and would not let the umbrella tile easily which make makes this item more durable and reliable.. 20 x 20 x 13 inches.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.