Part Numbers:
The US and international catalog number is
80-6647-00 (20 x 2 mL (Cal 1)),
80-6648-00 (20 x 2 mL (Cal 2)),
80-6649-00 (20 x 2 mL (Cal 3)),
80-6650-00 (20 x 2 mL (Cal 4)),
80-6651-00 (20 x 2 mL (Cal 5)),
80-6655-00 (5 x 2 mL (Level 1, 2, 3, 4, 5)).