This ACDelco Advantage disc brake rotor is a great replacement part for your Expedition or Navigator. Measuring at 13.5 inches in length and with a rotor outside diameter of 13.5 inches, this rotor has a vented style and an uncoated finish. It has a bolt pattern of 6 x 135 mm and is suitable for rear placement on the left or right side of your vehicle. The rotor is made of cast iron material and has a thickness of 21.99 mm with a discard thickness of 19.9 mm. It is a new old stock (NOS) item with a manufacturer part number of 18A2460A and an interchange part number of 88878477. This product is not a vintage part and is manufactured in China with no universal fitment. Exact item is shown. New open box item with partial original packaging. Made in China. No returns if installed. This item is a new, opened customer return. It has been inspected and passed quality control to insure the condition described and contents are accurate. Please review actual photos as stock photos are not the actual item, our photos are. You will ONLY receive exactly what is shown in photos, regardless of what might have originally been included. Please review our business policies in our store for information regarding returns, shipping and warranties.