4Pcs Offset Umbrella Base Plastic Cantilever Base Weights Plate Set,180lb Black4 pc Weight Set for Offset Cross Base: The 4 triangular shaped black weight plates are designed to fit in a cantilever umbrella cross base and give the base a square shape when placed in each slot. The weights, when filled, will offer an appropriate amount of weight needed to stabilize your offset umbrella. Easy to Fill: Purchase Sand and use the included plastic funnel to fill each section with dry or wet sand. Screw the cap on and you have weight