Water/Sand Offset Cantilever Umbrella Base PlateBanana Manor water sand offset cantilever umbrella base plate weight set with design. These cantilever umbrella weights are the perfect solution for weighing down the cross base of an offset patio umbrella! The base plate weights are sold in a set of 4, so you can choose to use all 4 or use one on each side. each weight features durable plastic construction with an easy fill spout so each base weight can be with 43. 75 lbs of water or 50 lbs of sand.