Material: HDPE Shape: Square Assembled Dimensions : 40''W x40''L x3.9'' H(no wheel) / 34.3’’W x 34.3’’L x 9.4’’H (with wheel) Fill Weight : No wheel: Water filling:177lbs, Sand filling: 247lbs; Wet sand filling: 317lbs With wheel : Water filling:264bs, Sand filling: 369lbs; Wet sand filling: 448lbs This umbrella base applies to Cantilever/Offset umbrellas， it is recommended to fill it with water or sand to ensure the weight is above 100kg. Heavy Duty Stability This cantilever patio umbrella base weighs 448 lbs when filled with water or sand. This ensures excellent stability for your outdoor offset umbrellas, keeping them secure during windy days User-Friendly Design Equipped with wheels and a handle, this umbrella base is easy to maneuver. Move it effortlessly where you need it, making setup and adjustment a breezeVersatile Fill Options You can fill the base with 264 lbs of water or use dry sand for a maximum weight of 369 lbs. The flexibility allows you to choose the best option for your needs and environment Durable HDPE Material Constructed from premium HDPE, this umbrella base is tough, corrosion-resistant, and designed to withstand outdoor conditions. Enjoy long-lasting performance without worries of damage Convenient Water Fill Port Refilling is simple and efficient With side water fill port. Just fill it once for a stable setup, so you can relax under your umbrella instead of constantly adjusting it