Pool Plugs: You get 3 black rubber expansion plugs in 3 sizes: 1 inch (about 2.5 cm), 1.5 inches (about 3.8 cm), and 2 inches (about 5.1 cm) for your daily and replacement needs, helping to protect your pool during the cold winter. WIDE APPLICATIONS: This pool plug can be used as a pipe plug to prevent backflow and keep water out of the pipes during winter. This expansion plug also has other uses, such as testing pool pressure and preventing pool flow during equipment maintenance. Stable Performance: The winter pool plug is made of rubber, which is stable and robust. Furthermore, this screw-on pool plug is also carefully designed to withstand the cold and won't slip or shrink; it can be used for a long time. Practical: These expandable rubber plugs protect pool pipes by preventing access to the pipe. You only need to screw the plug onto the pool's return water line. Threaded pool return pipe plugs help prevent pipe bursts. They bring convenience to your daily life: these pool skimmer plugs can be used as plumbing plugs, and the threaded pool return plumbing plugs are suitable for winterizing and swimming pools; you can use them in outdoor pools, kitchen and bathroom sinks, and small indoor pools. Color: Black. Material: Rubber. Package Contents: 3 Pool Plugs. Dear Customer: When purchasing products from this store, you can enjoy the following benefits: 1. Free international shipping (if the goods meet the free shipping standard of the sale price). 2. Sufficient stock, welcome to place an order. 3. Free return: You can return the goods within 30 days of the date of receipt. 4. Your order will arrive at its destination within 10-15 days. 5. If you still haven't received the product, please contact us for a solution. We will handle it as soon as possible. Due to the time difference, we may not be able to respond immediately; please be patient. Have a great day and happy shopping!