Function: These expansion plugs are to winterize your swimming pool, protecting it from harsh winter and stain damage. The tapered plugs, covered by rubber, can also be used to block or seal some holes, pipes, drains, sinks, tanks, etc. in your pool, kitchen, bathroom or yard. Used as pipe plugs, to plug skimmers, returns and cleaner lines - to prevent water from entering the pipes during winter. Expansion plugs have other uses too, such as pressure testing pool lines or other methods of leak detection, or stopping water flow from the pool when equipment repairs are made 100% Band and high quality.<br><br>Material: Rubber + Stainless Steel colour: Black<br><br>Package Contents: 6 x Pool Plug(2 x 25mm, 2 x 38mm, 2 x 51mm)