Features: 1. This winterizing plug is made of rubber and has maximum expandability to ensure a tight seal. 2. Used as a plug to plug the oil skimmer, return pipe and detergent pipe to prevent water from entering in winter. 3. Expansion plugs are also used for other purposes, such as pressure testing pool pipelines or other leak detection methods, or preventing water from flowing out of the pool during equipment maintenance. 4. Use this rubber expansion plug to protect your swimming pool from the harsh winter. 5. This pool winter plug strictly follows factory quality control, compact size and easy to carry. Specification: Item Type: Winterizing Plug Specification: Approx. 63mm / 2.5in Purpose: Used as a pipe plug, plugging oil skimmer, return pipe and detergent pipeline-to prevent water from entering the pipeline in winter. Expansion plugs are also used for other purposes, such as pressure testing pool pipelines or other leak detection methods, or preventing water from flowing out of the pool during equipment maintenance. Weight: Approx. 145 g / 5.1 oz Package List: 1 x Winterizing Plug Features Maximum Expandability: This rubber winterizing plug offers maximum expandability, ensuring a tight seal to protect your swimming pool pipework during the winter. Versatile Usage: Use this rubber expansion plug to prevent water from entering your pool through the oil skimmer, return pipe, and detergent pipe, or for pressure testing and leak detection methods. Winter Protection: Safeguard your swimming pool from the harsh winter with this pool winter plug, ensuring that water does not flow out during equipment maintenance. Factory-Quality Control: Strict adherence to factory quality control standards ensures reliability, while the compact size makes it easy to carry for convenient use. Durable Material: Constructed from high-quality rubber, this pool winterizing plug provides long-lasting protection for your pool pipework.