"Premium Material: This umbrella corner is made of high-quality high-density rubber, which is not easily cracked when exposed to wind and sun, and is durable. It is a great choice for your accessoriesof outdoor umbrella. EASY TO INSTALL: Install this umbrella hole plug in seconds, easy to remove and store. You can start by inserting this umbrella cone into the hole of the table, screw it and install it into the hole of the table. Next,put an umbrella, it's easy to use. (If installation is a bit tricky, a lubricant/oil/vaseline may help) Perfect fit: With this umbrella cone, you can stabilize the umbrella, reduce and prevent scratches or knocks on unstable umbrella poles. Suitable for umbrella pole diameter of 1.5""/ 38mm, thickness of5mm, 1.94-2.7" ring diameter tempered glass, fit most umbrella hole. 1. Take the umbrella and pole out of the hole in the patio table. 2. Place the tapered wedge on the parasol pole. 3. Put the umbrella and pole back into the hole in the patio table. 4. Rotate the bevel and press lightly to press it firmly into the hole. Dimensions: 69 x 69 x 57.4mm Diameter: 49.3 to 69.1 mm / 1.94 to 2.72 inches"