Heavy-Duty Cantilever Offset Patio Umbrella Base Set, 317LBS Weight Support, Durable HDPE Construction, Stackable Portable Handle Design, 4-Piece Base Stand for Backyard Poolside

‌【Heavyweight Stability for Wind Resistance】 This base provides exceptional anchoring power, holding up to 353 lbs when filled with wet sand (318 lbs with dry sand or 282 lbs with water). The substantial weight keeps your umbrella securely in place during windy conditions. 【Durable Weather-Resistant Construction】 Made from high-quality HDPE plastic with protective coating, the base withstands sun, rain, and outdoor elements year after year without deteriorating. 【Convenient Weight Adjustment System】 Four separate fill chambers with twist caps allow easy filling and draining. Choose between water or sand to customize the weight based on your needs. 【Optimized Support Dimensions】 Each 19.5" x 19.5" panel provides a wide, stable foundation that effectively supports both cantilever and offset umbrellas. 【Practical Storage Solution】 When empty, the lightweight panels can be stacked for compact storage, saving valuable space during off-seasons.