1 vial of 50 test strips. For blood glucose testing with OneTouch Verio family of meters. Accuracy you can trust. In vitro diagnostic. Reagent Composition: Each test strip contains: flavin adenine dinucleotide dependent glucose dehydrogenase or FAD-GDH (from Aspergillus sp.) - 2 U; potassium ferricyanide 41 mcg; and other ingredients (buffer, etc). The vial contains a drying agent. 1 vial of 50 test strips. www.OneTouch.com. As your partner in diabetes care, we welcome you to contact us (7 days a week, 8:00 am - 8:00 pm Eastern Time) at 1 888 567-3003 (English), 1 888 567-3010 (Espanol), or www.OneTouch.com. Test strips made in UK.