To ensure the product's longevity, do not stand on the umbrella base. Screw the lid on to prevent the water from evaporating. Crestlive Patio cantilever umbrella base can fill sand or water. The square umbrella stand with 3D surface. It is made of durable HDPE material with... [STUDY AND DURABLE]The umbrella base is made of durable, high-density polyethylene material that is waterproof and UV resistant, making it suitable for long-term outdoor use. [BASE BORE DIAMETER]The maximum hole diameter of the base is 2.00 inches, which is suitable for most outdoor umbrellas. Devoko 70 lb Patio Umbrella Base, 2.00 Patio Umbrella Bases Devoko 70 Lb Patio Umbrella Base, 2.00 Umbrella Barbados | Ubuy Umbrella Base Fillable There is a knob at the attachment point to ensure the stability of the umbrella once it is inserted into the base, so the umbrella will not tilt even when the wind is blowing. The Tempess NaviStyle High Back Seat is designed fo boating enthusiasts, featuing a high back fo supeio suppot and a sleek gay fabic that combines style with duability. Measuing 19.5 x 18.25 x 24 inches, this seat is pefect fo long days on the wate, ensuing comfot and ease of installation [WATER INLET DESIGN]The top of the umbrella base has a water filling opening.