- Made from durable PC and ABS materials, this adapter ensures longevity and a secure fit in pool sleeves with single threads. - Keep your pool umbrella stable with this stabilizing sleeve adapter, designed for 3.8 cm and 3.4 cm umbrella poles, providing essential stability in windy conditions. - Create shaded relaxation areas on concrete, wood, or composite pool decks during family gatherings or sunny afternoons. - The compact 4.5 x 6.1 cm design prevents tipping and simplifies installation, delivering dependable performance throughout the year, even in harsh weather. - Ideal for pool parties, outdoor events, or everyday use, this adapter enhances your outdoor experience by ensuring your umbrella stays in place, offering peace of mind while you enjoy the sun. - Its compatibility with multiple pole sizes and robust construction make it a must-have accessory for any pool setup.