New innovative Cuvette Rack holds up to twelve-12.5mm x 12.5mm cuvettes. Rack features a hinged lid with secure clasp. Molded of polypropylene, the boxes include a removable insert for ease of cleaning. The 60mm high box will accommodate the tallest of spectrophotometer cells even those with covers or stoppers. The racks stack neatly to save space. Racks measure 4.5x4.5x2.25H-in.