Efficient protection of swimming pools: Winter plug pools can block the drainage pipes or pipes of the swimming pool, preventing winter water from flowing into the pipes and freezing, damaging the swimming pool's drainage system. Protect spouts and drain holes from freezing. High Quality Materials: The swimming pool winter stopper is made of high quality rubber and stainless steel wing nuts. Durable, corrosion-resistant and rust-proof. No pungent smell. Easy to Install: The pool inlet nozzle rubber stopper is easy to install. All you have to do is find out the diameter of your pool pipe, then purchase our pool plug and close the drain. It is a very practical swimming pool antifreeze accessory. Wide range of uses: Swimming pool plugs have a wide range of uses. They can not only be used to block swimming pool water pipes, but also block return pipes in winter to prevent water from entering the pipes in winter. Also suitable for pressure testing or maintenance of pool pipes Specifications: 25mm, 32mm, 38mm, 51mm, 45mm, 63mm (optional) Package includes: 2*pipe antifreeze plugs Note: 1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding. 2. Color may vary due to different monitors, please understand. Hello, please pay attention to your delivery address when purchasing products. If your delivery information (such as name, street, house number, doorbell/mailbox without name, etc.) is incorrect, the order will not be delivered correctly.)