Specifications 
B-4 
No more than 20 digits (sample ID) 
No more than 19 digits (sample ID)+1 digit (check digit) = 
no more than 20 digits 
No more than 20 digits (sample ID) 
No more than 19 digits (sample ID)+1 digit (check digit) = 
no more than 20 digits 
No more than 20 digits (sample ID) 
No more than 19 digits (sample ID)+1 digit (check 
digit) = no more than 20 digits 
 
NOTE 
  The manufacturer suggests you use check digit to reduce the possibility of 
misreading. 
 
2.    Barcode label dimensions 
 
Barcode height: A≥10mm 
Label width: B≤45mm 
Clear area width: C≥5mm 
 
Wide-to-narrow ratio: between 2.5: 1 and 3.0: 1 
Width of the narrowest bar: above 0.127mm 
Code  quality:  According to  ANSI  MH10.8M  standard, the code quality shall be Level C or 
above. 
 
3. Samples of valid and invalid barcode labels: 
Use of  invalid  barcode  labels  shown  in  the following figures will increase the  possibility  of 
misreading. To ensure good readability, use valid labels.