Product packaging --- You will receive 2 swimming pool antifreeze plugs. Size: about 38mm/1.5in. Material --- The winterizing plug is made of high-quality rubber, which has the largest expansion and good sealing performance, and can be used for a long time. Excellent performance --- After the swimming pool is drained, the rubber plug is used to block the pipe to prevent water from entering the pipe and causing freezing. Multi-purpose --- Used as a rubber plug to block the oil skimmer, return water and cleaning pipes to prevent water from entering in winter. It is also possible to test the pressure of the pool pipeline, or to stop water flows into the pool during equipment maintenance. Delivery quantity: 2 pieces