Shop Print Media, No drawers, For Calibration of the Serum Sodium, Potassium and Chloride Assays, Dry Pro™, 20 Unit / mL, 55% Cotton / 45% Polyester, 1.00 Inner Diameter / 2.4 mm Inner Flange Diameter / 2.4 mm Outer Flange Diameter / 1.6 mm Inner Flange Distance / 2.4 mm Total Length