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2-Adjustable turn knobs: Features 2-hand-turn tightening knobs for securing umbrella to the base, tighten the adjustable knob in the steel pipe to ensure optimal strength and stability no matter the umbrellas pole size. Holds various umbrella sizes: A wide range of application, ideal for holding most 6 ft. to 10 ft. umbrellas. Plastic inserts on top of steel pipe fit for 1.5 in. 38 mm - 1.9 in. 48 mm umbrella poles. Color: black.
