The manufacturer should be more specific regarding what models this will work with and suggested use. Our 10' cantilever umbrella (same manufacturer) has fell over twice in just a couple weeks while using these. 1) we used water and despite some reviews, have had no leaks yet.. but im not sure its enough weight. May try sand eventually. 2) There should be a way to secure it to the umbrella, not just set it on the sides of base, as the legs can still get free, causing the umbrella to fall over.