Package includes: you will get 4 pieces of white pool umbrella stabilizer sleeves, enough to meet your usage needs, you can use them anywhere you need, such as on your deck, you can also send them to your friends. Suitable size: the pool umbrella adapter has an inner diameter of 4 cm/1.57 inches and a height of 3.5 cm/1.38 inches, suitable for mounting 1 3/4 inch umbrella insert on your pool deck; The dimensions listed refer to the diameter of the umbrella pole, not the hole in the pool deck, please note that they do not fit patio tables. Practical features: the umbrella pole stabilizer can effectively stabilize your pool umbrella from wobbling or tilting; You can install it easily, saving time and effort. Long-lasting and corrosion-resistant: the pool umbrella sleeve adapter is made of quality plastic material, UV-resistant and corrosion-resistant; It can withstand wind and sun, will not break or deform easily, you can use it for years. Multi-scene use: The umbrella stand adapter is simple in appearance and discreet in color, it blends well with the surroundings, you can use it for pool umbrellas, outdoor sunshades and beach umbrellas.