Usage Tips:Features: Keep Umbrella Stable: The patio umbrella sleeve can firmly fix outdoor umbrella, keep the table umbrella from shaking, provide safe better usage. Durable Material: The table umbrella hole ring plug is made of silicone/rubber material, which is soft and flexible, durable and reusable, not easy to deform. Easy to Install: The patio table umbrella is easily installed. It juts take a few minutes to install, keeping the umbrella properly seated, reduces swaying. Wide Applications: Patio table umbrella stabilizer is perfect for gardens, yards, poolside, coffee shops, restaurants, balconies, beaches, and more. Intimate Service: If you have any questions about our products, please feel free to let us know. We will provide you with quality service. Specifications: Material: Rubber/Silicone Fit: for outdoor table umbrella 1 * Umbrella Cone Wedge OR 2 * Umbrella Cone Wedges OR 1 *Umbrella Hole Ring OR 2 *Umbrella Hole Rings OR 1 Set * Base Brackets OR 2 Set * Base Brackets