Our threaded return line antifreeze plug is the good solution for winterizing your pool. This pool replacement stopper is designed to fit snugly into the return line, preventing water from entering and freezing. To use, screw the plug into the return line until it is secure. This will help protect your pool's plumbing system from freeze damage, saving you time and money on repairs. Features -Color:Black -Material:Plastic -Size:5.20X5.20X3.00cm/2.04X2.04X1.18in -Thread size:Approx. 4.8cm/1.9in -Inner diameter:3.81cm/1.5in -Simple installation: the pool antifreeze plug is designed for easy installation, allowing users to easily place and remove it as needed -Secure threaded design: the threaded design plug ensures a secure and reliable fit, making installation and removal straightforward -Versatile applications: ideal for antifreeze, drainage, and sealing, this plug offers versatile applications for pool maintenance -Winter protection: provides effective protection against pipe freezing during winter, safeguarding your pool's plumbing system -Avoids equipment damage: by preventing water from freezing, the antifreeze plug helps avoid damage to the pool's structure and equipment Package list: 3 x Pool Drain Plug