Product Packaging--- You will receive 2 antifreeze plugs for swimming pools. Size: about 38 mm / 1.5 inches. Material--- The winterizing plug is made of high-quality rubber, which has the greatest expansion and good sealing performance, and can be used for a long time. Excellent Performance--- After the pool is drained, the rubber stopper is used to block the hose to prevent water from entering the hose and causing freezing. Versatile --- Used as a rubber stopper to block the oil skimmer, return water and cleaning lines to prevent water ingress in the winter. It is also possible to test the pressure of the pool pipe, or to stop the flow of water into the pool during equipment maintenance. Warranty--- If you have any questions about our products, please feel free to contact us, we will do our best to help you.