Name: Silicone Umbrella Cone Size: As Pictured Color: Black Quantity: 2 pieces Material: rubber Uses: roof umbrella, sunshade, courtyard umbrella inner hole sleeve [Dimension]: Compatible for umbrella pole diameter: 1.5 inch / 38mm. The outer diameter at the smallest edge is 1.94 inch, the outer diameter at the largest edge is 2.7 inch. [Handy Tool]: The tapered design keeps the umbrella properly seated and reduces umbrella swing to prevent scratches or dents. [Easy to install]: It works with a table and umbrella combination, only takes seconds to set up. Push, twist and turn until fully inserted. [Durable material]: Made of weatherproof rubber material, can be used outdoors, not easy to be damaged.