The threaded return winterizing plug is a must-have for any Pools owner looking to safeguard their Pools during the colder months. This durable plug fits securely into the return line, blocking water and debris from entering. To use, insert the plug into the return fitting and tighten it by hand or with a suitable tool. This simple step you from costly repairs and maintenance come spring. Features -Color:White -Material:Plastic -Size:5.50X5.50X3.50cm/2.16X2.16X1.38in -Thread Size: Approx.4.8cm/1.9in -Inner Diameter: 3.81cm/1.5in -sturdy material: constructed with durable plastic, providing sturdy antifreeze capabilities and use -Userfriendly: easy to install by simply inserting the plug into the pool return , making it convenient for anyone to use -Freeze protection: prevents freezing of pool return pipes in winter, protecting them from damage caused by ice formation -Multipurpose: can be used for various water systems, including pools, water tanks, and pipes, enhancing its utility -Durable and reusable: built to withstand outdoor conditions, this plug can be reused multiple times without wear and tear.</b Package list: 1 x Threaded Winter Pools Plug