Effective ice protection: This skimmer plug acts as an ice compensator within the skimmer housing, absorbing water expansion to prevent potential damage or cracking. Easy to use: The Winterization plug screws in easily. Just ensure that the pipes are completely drained of water before installation for results. Compact size and compatibility: Measures 8 cm x 25 cm. This single pack product offers a convenient fit for most standard skimmers while protecting against winter freeze damage. construction: Made from quality PP material, this skimmer is built to withstand harsh winter conditions and provide reliable long term performance. Key benefits: Reduces the risk of ice related damage to the skimmer during cold seasons, simplifies winterization, and helps extend the life of your skimmer infrastructure with a straightforward installation. Use scenarios: Outdoor pool in freezing climates: Install before peak winter to protect the skimmer housing from ice expansion. Seasonal spa or hot tub skimmers: Use during cold months to prevent cracking from freezing water. General winterization for standard pools: Compatible with most standard skimmers to safeguard components during winter storage or inactivity.