If your refrigerator's sliding mechanism is not functioning smoothly, it might be time to replace the assembly rail (DA97-12696B). This genuine Samsung part ensures that your refrigerator's doors slide open and close effortlessly. Essential for the 29.7 cu. ft. 4-Door Flex French Door Refrigerator and the 30 cu. ft. 4-Door French Door Refrigerator, this assembly rail provides the support needed for optimal door movement. Double-check your appliance's model number to confirm compatibility before purchasing.