Strong umbrella stabilizer – These stabilizers create a tighter fit between the umbrella pole and the base, preventing accidents or damage. Easy to install – Setup takes only 2 minutes. Three steps: 1. Insert the base stabilizer into the bottom of the umbrella stand base. 2. Choose the correct size from the two included ring parts (separate them first) and place it on top of the stand base. 3. Insert the umbrella into the base and use the provided thread to tighten. Wide application – Suitable for most umbrellas, including beach umbrellas, market umbrellas, and patio umbrellas. The strong material allows for use in various conditions such as beaches, balconies, backyards, and pools. Material: Metal + plastic Color: Black Package contents: 1 x Spare parts kit (8 pieces) Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual item. The allowable measurement error is +/- 1-3cm.