Shop No drawers, 92% Polyester / 8% Spandex, Dry Pro™, Submucosal Lifting Agent, 15-3/4 Inch Length, 1 mg / 0.2 mL, For Calibration of the Alinity i Analyzers when used for the Quantitative Determination of the Total Binding Capacity of Human Serum or Plasma for Thyroid Hormone Thyroxine