Filled with sand and water together this base reaches 198 lb of ballast, which is the kind of weight an offset umbrella needs before it will hold its arm out over a seating area in a breeze. Sand alone gives 154 lb of ballast, while water alone comes to 132 lb of the same. Two wheels and moulded handles let one person tip and roll all that weight across a terrace instead of dragging it, and a wide filling hole plus a drain hole make the seasonal fill and empty quick. The cross base is included to match an offset umbrella with a 1.9-in pole, sold separately, and assembly needs no tools. Material: HDPE Metal; Overall Dimensions: 31.5" x 24" x 7" (L x W x H) Cross Base; Capacity of the Sand: 154 lbs Fill; Pole Diameter: (not included): 1.9" Suitable Umbrella; Size: 9 ft; Net Weight: 13.5 lbs; Package Includes: 1 x Umbrella Base 1 x User’s Manual