Welcome to our store! This winter plug is made of durable rubber with maximum expandability to ensure a tight and secure seal. It is used as a plug to block the oil skimmer, return pipe, and detergent pipe, effectively preventing water from entering during winter. Expansion plugs are also suitable for other purposes, such as pressure testing of pool lines or other leak detection methods, or to prevent water from draining out of the pool during equipment maintenance. Use this rubber expansion plug to protect your swimming pool from the harsh winter. This pool winter plug strictly follows factory quality control, has a compact size, and is easy to carry. Item type: Winter plug. Specification: Approx. 63mm / 2.5in. Purpose: Used as a pipe plug to plug oil skimmer, return pipe, and detergent line to prevent water from entering the line during winter. Expansion plugs are also used for other purposes, such as pressure testing of pool lines or other leak detection methods, or to prevent water from draining out of the pool during equipment maintenance. Weight: Approx. 145 g / 5.1 oz. Package includes: 1 x Winter plug. Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We do our best to provide you with satisfactory after-sales service.