Shop Print Media, No drawers, 92% Polyester / 8% Spandex, Dry Pro™, Submucosal Lifting Agent, 15-3/4 Inch Length, 12 X 0.25 mL, For Calibration of the Alinity i Analyzers when used for the Quantitative Determination of Thyroxine in Human Serum and Plasma, 50 mcg