[Size] - Connector size: [Material] - Rubber plug for winterizing pool plumbing. [Feature] - Stainless steel button, rust-proof, durable for long time use. [Easy to use] - Button design for convenient installation and operation. [Applications] - Used as pipe plug, to plug skimmers, returns and cleaner lines - to prevent water from entering the pipes during the winter. Plugging holes from 45 to 50 mm, the upper diameter is 53 mm, the lower diameter is 42 mm and the height is 32 mm Delivery quantity: 1 piece