California Umbrella 75 lbs. Round Concrete Weighted Powdercoated Steel Umbrella Base With Wheels, Black Frame Pole opening diameter: 1.75"; product dimension (L x W x H): 18 x 18 x 18; Weight: 75 pounds Wheels for easy movement Constructed of powder coated steel with concrete Fits any California Umbrella outdoor umbrella Securely holds 7 - 9 foot patio umbrellas