Shop Print Media, No drawers, 92% Polyester / 8% Spandex, Submucosal Lifting Agent, 50 Foot Length, Burton Medical®, Poly Backing, Flocked Swab Tip, For the Calibration of the Alinity i Analyzers when used for the Quantitative Determination of Free Prostate Specific Antigen (PSA) in Human Serum