Brand New OEM Sub-Zero Refrigerator Door Gasket for Refrigerator models: 648PRO. Note on Compatibility: This gasket can be used regardless of serial number. However, please be aware that for units manufactured prior to serial number 2946394, the gasket dart (the channel in which the gasket sits) is a different size. In these earlier models, the gasket may not seat properly, and in some cases, a complete door assembly replacement may be required instead of just replacing the gasket. Because of this variation, it is important to confirm your refrigerator?s serial number before ordering to ensure you receive the correct part and avoid potential installation issues. Restore Your Sub-Zero?s Performance with a New Gasket Keep your food fresher for longer and your Sub-Zero running at peak efficiency. This brand-new, genuine replacement gasket ensures an airtight seal, preventing cold air loss and helping your refrigerator maintain optimal temperature. Easy to install and built to fit perfectly, it?s the simple upgrade your luxury appliance deserves. Don?t wait ? replace that worn gasket and restore your Sub-Zero?s legendary freshness today! After selecting Buy It Now, please provide the model and serial number of your refrigerator so we can confirm you receive the correct gasket. We cannot ship your order without this essential information. THIS IS A GENUINE REPLACEMENT PART. PLEASE BE SURE THE PART YOU ARE ORDERING IS COMPATIBLE AND DOES WORK WITH YOUR APPLIANCE. Please allow 3 business days for shipping.