Strong Umbrella Stabilizer - These stabilizers ensure a tighter fit for the umbrella pole in the stand base, helping to prevent accidents or damage to the umbrella. Easy to Install - Setup takes only 2 minutes. Follow 3 simple steps: 1. Insert the base stabilizer into the bottom of the umbrella stand base. 2. Select the appropriate 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 secure it using the provided tightening mechanism. Wide Application - The umbrella hole ring plug fits most types of umbrellas, including beach umbrellas, market umbrellas, and traditional patio umbrellas. The durable materials allow these adapters to be used in various environments such as beaches, balconies, backyards, and poolside areas. Material: Metal + Plastic Color: Black Package Contents: 1 x Replacement Parts Kit (8 pcs) Note: Light reflection and differences in display screens may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.