DescriptionOrigin : Mainland ChinaType : Pool Winterizing PlugMaterial : RubberFeature1 : Swimming Pool Leak ProofFeature2 : Winter Expansion PlugFeature3 : Swimming Pool FittingsBrand new and high quality Material: Rubber Color: Black Type: Expansion Plug Size:25mm,32mm,38mm,45mm,51mm,63mm Description: Material: The winter expansion plugs are made of high quality rubber material, with stainless steel screw bolts, reliable, stable, anti rust, not easy to break, durable and long lasting. Function: Pool Winterizing Plug is designed to plug your swimming pool pipes after they have been drained, avoiding water entering and causing freeze. Easy to Use: Just screw the plugs into all return and drain inlets, convenient to handle and use, need no much efforts. Application: Used as pipe plugs, to plug skimmers, returns and cleaner lines to prevent water from entering the pipes during winter. Multifunction: The plug can also be used for pressure testing pool lines or other methods of leaking detection, or stopping water from the pool. Package Includes:1* Expansion Plug