Simpooltec AGWM-H Widemouth Above Ground Skimmer Plug Guaranteed water-tight, the ultimate in freeze protection for your skimmer Simply press plus in place to close off skimmer. No tools required! Keeps skimmer dry all winter long to prevent freeze damage without draining pool water Blocks water from entering the skimmer, making serving your pool fast and easy Fits most wide mouth aboveground skimmers