Strong adsorbability This product has strong adsorb ability, it is stable and it is not easy to fall off after adhering, and it has strong practicability. High quality This product is made of high quality plastic material, it has thick texture. It can be used for a long time. Exquisite workmanship This product has exquisite workmanship. It is round and smooth. With the firm structure, you not hurt your hands when you use it. This specially designed vacuum attachment vent under pressure when attaching a vinyl pool liner. When the vacuum is blocked or sealed on the pool floor, its double safety valves can release the suction, thereby reducing the pressure of the filter pump and preventing the vacuum from attracting the pool lining. Wide range of applications This product has wide range of applications, it can be used in many places, such as the swimming pool, floor, wall, etc. Use a hose to connect my product and the suction device to clean the pool