Ultra-speed DF-58 #2 Dental X-Ray Film in a 1-Film PAPER Packets 150/Bx. Ultra-speed DF-58 Periapical X-Ray film is a D-speed Film that generates the high quality, detailed images you need to make accurate diagnoses. Versatile and easy-to-use, Ultra-speed delivers consistent images in both manual and automated processing. Box of 150