Package quantity: you will receive 2 pieces pool winterizing plugs, enough quantity for you to use and replace, good for you to protect your pool in the harsh winter season.Note:please take care of the product size before purcahsing.Reliable material: these swimming pool winter expansion plugs are made of quality rubber material with SS screws and stainless steel screw bolts, stable and not easy to rust or break, can serve you for a long timePractical tools: these rubber plugs are designed to plug your swimming pool pipes after they have been drained to avoid water from entering the pipes and causing freeze influenceEasy to use: you just simply screw the plugs into all return and drain inlets after blowing out lines, with proper dimension, convenient to handle and use, wont take you much effortWide application: our winter expansion plugs could be applied as a pipe plug to plug the skimming device, return pipe and cleaning pipe to avoid water from entering the pipe in winter and causing inconvenience inside the pipe, and they also can stop water from the pool when repair the equipment