Good effect: Protect your pool from harsh winter weather with antifreeze plugs. A simple solution can prevent serious damage to your pool. Scope of application: Used as pipe plugs, to plug skimmers, returns and cleaning lines, to prevent water from entering pipes during winter. Multifunction: Expansion plugs also have other uses, such as pressure testing pool pipes or other leak detection methods, or to stop the spread of pool water when equipment repairs are performed. Rubber material: The rubber plugs for the pool are made of rubber for maximum stretchability to ensure a tight seal. Good workmanship: Exquisite workmanship, beautiful appearance, small size and portable, giving you an excellent user experience. Product description Scope of application: Used as pipe plugs, to plug skimmers, returns and cleaning lines, to prevent water from entering pipes during winter. Expansion plugs also have other uses, such as pressure testing pool lines or other leak detection methods, or to stop the spread of pool water when equipment repairs are performed. Rubber material, The rubber plugs for the pool are made of rubber for maximum stretchability to ensure a tight seal. Good workmanship, Exquisite workmanship, beautiful appearance, small size and portable, giving you an excellent user experience.