MYARD Umbrella Cone Wedge Spacer fits Patio Table Hole Opening or Base 2 to 2.5 Inch, Pole Diameter 1 1/2" (38mm, Black) MEASURE YOUR TABLE & UMBRELLA POLE BEFORE ORDER.  This umbrella wedge might have a pre-cut seam at one side for better-fit the umbrella pole, and it works fine inside the patio table hole. Fits umbrella poles up to 1 1/2 inches (38mm) in diameter; table opening 2 to 2.5 inches, or umbrella weight base hole diameter 2 to 2.5 inches (see images) Lubricating oil / soap-suds / vaseline / Sanding might be helpful in installation.  No more swaying / wobbly umbrella. Curved (see engineering drawing in second images) Tapered Design keeps the Umbrella properly seated and eliminates any rattles. Installs in seconds and is easily removed for storage. We have two sizes for umbrella poles in diameter: 1 1/2" (38mm) or 1 3/8" (35mm). 100% Brand New & Extra weather-resistant material used for outdoors. Installation: 1. Draw out the umbrella and pole from the hole on the patio table. 2. Install the Myard Cone Wedge onto the umbrella pole. 3. Insert the umbrella and pole back to the hole on the patio table. 4. Spin and push the Cone Wedge downard gently in order to have it sinked into the hole compactly. (lube / oil / vaseline might help in doing this) 5. DONE