... and concentration directly readout;Spacious sample compartment, 4 position cell rack, adaptable for 1-5 cm optical path rectangular cells.SPECIFICATIONS ... 2 Cases3) 1cm 4 position cuvette rack 1 PC. 4) Power cable 1 PC.5) Operation manual 1 PC.6) Certificate of quality checking ... 1 cm, 2 cm, 3 cm,5cm4) 5 cm cuvette rack suitable for 1-5cm cuvette5) Spectrophotometer data processing software package ...