1 large heavy-duty cast iron umbrella base. Cast iron includes one sturdy umbrella base. One pole thumb screw secures umbrella in base. Removable umbrella pole adapter for poles 1.5" to 1.75" diameter 22.5" diameter x 16" h, weighs 44.2 lbs.Accommodates patio umbrellas with 1.5" to 2" diameter pole. Ensure that the patio umbrella stays firmly in place with this umbrella base from sunnydaze decor. Constructed of strong and heavy-duty cast iron, this patio umbrella base is weather resistant and will ensure that the patio umbrella stays put. This umbrella base stand is designed with versatility in mind. Alone, it can accommodate umbrella poles up to 2 inches in diameter. The included pole adapter is designed to hold patio umbrella poles that have a smaller diameter, between 1.5 and 1.75 inches diameter. The included thumbscrew keeps the patio umbrella in place in the patio base.