Experience the perfect combination of functionality, durability, and style with our outdoor umbrella base. Trust its ideal size, resilient PP plastic construction, innovative 3D design, and the convenience of filling it with water or sand. ESPECIALLY for 9ft square umbrella; 10ft square umbrella; 10ft round umbrella; 11ft round umbrella; 9 X 11ft rectangle umbrella.   ✔️Recommended Umbrellas: (All recommended umbrellas fit this base; others do not）