Heavy-Duty Umbrella Stabilizer: These stabilizers ensure your umbrella pole fits securely into its base, preventing potential accidents or damage. Easy to Install: Just 2 minutes. 3 Steps: 1. Insert the stabilizer into the umbrella base. 2. Select the appropriate size from the two included rings (separate them first) and attach it to the base. 3. Insert the umbrella into the base and secure it with the included screw. Wide Application: The umbrella hole plug is compatible with most umbrellas, including beach, market, and patio umbrellas. Its durable material allows for use in various environments, such as the beach, balcony, garden, and poolside. Material: Metal + Plastic. Color: Black. Package Contents: 1 Replacement Kit (8 pieces). Only the listed package contents are included. Other products are not included. Note: Light reflection and different displays may affect color. This may cause the color of the item in the picture to be slightly different from the real thing. The margin of error allowed in the measurement is +/- 1-3 cm.