Simple Deluxe LGBRLABASECROSS 4pcs Cantilever Offset Patio Market Umbrella Base Stand with U Locking Square Shape Weights Water or Sand Filled; 176lbsHeavy-duty & weather-resistant: Made of HDPE plastic to withstand impact and constant movement; and treated with a weather and UV-resistant coatingSturdy 4-plate design: The 4 square shaped weight plates are designed to fit in a cantilever umbrella cross base; made with interconnecting pins to lock your umbrella base in place and secure it for hours (Note: Crossbar base is not included)Easy-to-fill spouts: Each plate is built with a fill spout and a twist cap to create a water-tight seal; can be quick and easy to refill; clean and storageHigh weight capacity: Can be filled with 176lbs of water or 132lbs of sand; provides a solid anchor for offset umbrellas and protects them from incidental damage caused by falls and harsh weatherHandle design: After emptying the ballast; the plate can be easily moved with the carrying handle. Dimensions (per plate): 19.7"(L) x 19.7"(W) x 3"(H)