Feature: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 PlugSpecification: Approx. 63mm / 2.5inPurpose: 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 ozPackage List:1 x Winterizing PlugNote:1. Please allow 02 cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.