Umbrella Base Weight, Parasol Base Weight, Heavy Duty Weights Square Base, 23.4LBS Black HDPE, UV-Resistant, Water Or Sand Filled Umbrella Base, for Patio & Poolside

‌【Durable Construction】 Crafted from premium high-density HDPE plastic, this umbrella base features a reinforced structure with UV-resistant and weather-proof treatment. The rugged surface resists scratches, corrosion, and cracking, making it suitable for long-term outdoor use under harsh weather conditions. 【High Weight Capacity】 With a total fillable capacity of up to 397 lbs using wet sand, 361 lbs with dry sand, or 335 lbs with water, this weight system offers superior holding power to keep large cantilever umbrellas firmly anchored and stable even in strong winds. 【Easy to Fill and Clean】 Each base plate is equipped with an extra-wide fill spout and a screw-tightened cap that forms a watertight seal. The accessible opening allows fast filling with a hose or scoop and simplifies cleaning and drying when not in use. 【Secure Anti-Slip System】 The four-plate assembly locks securely using integrated metal pins and features a textured anti-skid bottom surface. This design minimizes movement on decks, patios, or poolside areas and offers enhanced safety and collapse resistance. 【Universal Compatibility】 Designed for 8-10 ft cantilever umbrellas, each plate measures 20.5" x 20.5" x 4.7" and supports up to 88 lbs. The modular system allows flexible arrangement and is easy to move, store.