Specifications: With simple structure, after blowing out the pipeline, you only need to screw the plug into all the return and drain ports. Using winterizing plugs to protect your pool against the harsh winter season. The swimming pool winter expansion plug is made of durable rubber material which can serve you for a long time. Item Name: Rubber Plug Material: Rubber Features: Winterizing, Swimming Pool Supplies, Protective Size: Upper Diameter: 6.3cm/2.48"(Approx.) Lower Diameter: 5.3cm/2.09"(Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Rubber Plug Note: 1.Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 191 hours Hope you have a pleasant shopping experience!