Labelling of the buffer bottles. Two common sizes of buffer bottles, labeled according to the HarT requirements. The label used for the large buffer bottle has a size of 4.9 cm × 3.0 cm; all information is displayed in a font Times New Roman, size 10 points, bold. For the small buffer bottle, a label of 4.9 cm × 2.3 cm is used. Essential information (commercial name, buffer bottle, expiration, lot number) is printed in Times New Roman bold, size 9 points; other information is printed in Times New Roman bold size 7 points.