General description Protect your swimming pool's plumbing with the CSPARKV 5pcs Winter Pool Plug set. These rubber winter plugs are designed to winterize water return pipes, preventing rainwater from entering and freezing, which can cause pipeline ruptures. Ideal for family garden swimming pools and other swimming pool applications, these plugs ensure a pleasant swimming experience by safeguarding your pool from damage. Technical specifications Material: Rubber and plastic Size: 1 1/2' threaded Quantity: 5 pieces Installation Easy to install by twisting the plugs into the designated openings No additional fasteners required Check the seal for optimal protection Usage Can be used to seal skimmers, return lines, and detergent lines Suitable for massage tub accessories, swimming pool accessories, and SPA accessories Other information Designed to withstand extremely cold temperatures without slipping or shrinking Conforms to standard specifications for strict sealing performance and leak