Package Includes: You will receive 4 white pool umbrella stabilizer sleeves, sufficient for your needs. These can be used in various locations such as on your deck, and they can also be shared with friends. Suitable Size: The pool umbrella adapter has an inside diameter of 4 cm (1.57 inches) and a height of 3.5 cm (1.38 inches), designed to fit 1 3/4 inch umbrella poles on pool decks. Note that these dimensions refer to the umbrella pole diameter, not the deck hole size, and they are not compatible with patio tables. Practical Features: The umbrella pole stabilizer helps prevent wobbling or tilting of your pool umbrella. Easy to install, saving time and effort. Long Lasting and Corrosion Resistant: Made from quality plastic material, this umbrella sleeve is UV and corrosion resistant. It withstands outdoor conditions, including sun and wind, and is durable enough for long-term use without cracking or deforming. Multi Scene Utilization: Featuring a simple design and neutral color, this adapter blends well with outdoor environments. Suitable for use with swimming pool umbrellas, outdoor sunshades, and beach umbrellas.