Product description Color:black ?Please measure the diameter of your table and umbrella pole before purchasing ?It is suitable for 1 1/2 inch / 38 mm diameter umbrella rods; table opening be 1.9 to 2.7 inches,or umbrella base hole diameter 1.9 to 2.7 inches ?No need to worry about wind-induced tilting or shaking, it can help the table umbrella stand upright without shaking. ?Help the umbrella stay upright on the table. ?Stabilizes the patio umbrella to reduce and prevent scratches and dents caused by friction. ?works with any table and umbrella combination, keeps the umbrella properly centered over the table. ?100 Percent Brand New & Extra weather-resistant material used for outdoors. ?Easy to install, remove, and store (Steps) 1. Pull out umbrella and pole from the patio table 2. Attach the umbrella wedge to the pole 3. Insert the umbrella and pole back into the hole on the patio table 4. Gently rotate and push the wedge down so that it is firmly sunk into the hole (lubricant/oil/vaseline may help)