Nature's Blossom 4Pcs Offset Umbrella Base Plastic Cantilever Base Weights Plate Set, Water&Sand Filled Umbrella Base for Cantilever Offset Patio Umbrella, 180lb BlackSturdy construction: Umbrella Base is made of heavy duty plastic ,is real hard and weather resistant, UV protection coating, waterproof, stable and durable Weight Introduction: The whole base provides 150 lb weight when filled with sand or 180 lb when filled with wet sand, each plate can be filled with 38 lb 44 lb of wet sand Simple Assembly: A plastic funnel is included for filling in sand easily with instructions,Then just fill the base, and the