This is a genuine OEM Ford Engine Oil Filler Cap with the part number F3AZ-6766-B. It is a direct replacement for the OE/OEM part number EC-743 and is made for Ford Mercury Lincoln vehicles. The cap is designed to fit securely on the oil filler hole and prevent dirt and debris from entering the engine. It is a quality product from Motorcraft, a trusted brand in the automotive industry. The cap is made from durable materials and is designed to last for a long time.