Features: Pool plugs: includes 1 black plug available in 6 size options: 25mm, 32mm, 38mm, 45mm, 51mm, and 63mm, designed to help protect your pool during cold winter months. Widely applied: this pool plug functions as a tube plug to prevent water from flowing back into the plumbing system during winter; also helps prevent water outflow during equipment maintenance. Stable performance: made of stainless steel and PVC, the winter pool plug is durable, firm, resistant to cold temperatures, and does not slide or shrink; suitable for long-term use. Practical usage: these expanding rubber plugs help protect your swimming pool pipes by sealing off water flow; simply screw the plugs into place. Convenient: these pool plugs can be used as pipe stoppers for various applications, including outdoor pools, kitchen sinks, bathroom sinks, and small indoor pools. Specifications: Material: Stainless Steel, PVC Color: As shown in picture Size Options: 25mm, 32mm, 38mm, 45mm, 51mm, 63mm Package Includes: 1 x Pool Plug Note: Please allow 1–3mm variation due to manual measurement. The actual color may vary slightly due to monitor display differences.