POOL ANTIFREEZE CAP: This rubber winterizing cap helps protect pool pipes during winter by preventing water from entering and causing freeze-related damage. It can extend the life of pool hoses and reduce issues related to freezing. WIDE RANGE OF USES: Pool expansion plugs can be used to block pipes, oil skimmers, return lines, and chemical feed lines. They are also suitable for pool hose pressure testing, leak detection, or preventing water flow during equipment maintenance. HIGH QUALITY MATERIALS: Made of durable rubber and metal, this expansion plug offers excellent elasticity for a secure fit. It is compact, corrosion-resistant, rust-resistant, and built for long-term use. EASY TO INSTALL: Designed for convenience, this pool freeze cap requires no tools and can be installed in seconds. Its simple design makes it a practical and essential pool accessory. WHAT'S INCLUDED: 2 rubber expansion plugs, 25mm in size, suitable for most standard pool pipes. Compact and portable, ideal for winter pool protection. Note: Measurements are manually taken; please allow 1-3cm variation. Color may vary slightly due to lighting and screen display differences. Actual product may differ slightly from images.