Adjustable diameter compatibility Three PVC sleeves are provided to fit umbrella poles of different diameters: 11/4 inch (32 mm), 11/2 inch (38 mm), and 19/10 inch (48 mm). Choose the sleeve that matches your pole diameter to secure the umbrella properly. What is included Umbrella stand tube x2 11/4 inch (32 mm) PVC pipe sleeve x2 11/2 inch (38 mm) PVC pipe sleeve x2 19/10 inch (48 mm) PVC pipe sleeve x2 Steel nails x2 Metal ring x6 Easy to install and use There is a screw hole at the bottom of the base of the table umbrella tube holder. Insert the screws through the bottom of the slab and into the screw holes on the bottom of the stainless steel umbrella tube stand, then tighten. This prevents the umbrella from rotating in the wind and allows you to position it where you need. materials and durability Made from industrialgrade stainless steel for reliability and resistance to breaking or deforming. Welding spots around the bottom of the umbrella tube base reinforce strength, helping prevent bending or damage over time. Function and performance Adjustable to accommodate standard table umbrella poles via the three sleeves. Provides a stable, secure fit and supports easy repositioning of the umbrella as needed. Use scenarios Home patio setup where a central umbrella must be secured on a table to provide stable shade. Outdoor cafe or restaurant seating with varying umbrella pole sizes, requiring a secure, adjustable fit. Poolside or backyard areas where you want to move the umbrella to different positions while maintaining stability in windy conditions.