Shop Print Media, No drawers, 92% Polyester / 8% Spandex, Dry Pro™, Submucosal Lifting Agent, Poly Bagged Sterile / Sterile Inside Only, Mulberry, White, Not Made with Natural Rubber Latex, For Calibrating the Quantitative Elecsys Vitamin B12 II Assay on Elecsys and cobas e Immunoassay Analyzers