CODABLOCK F consists of a start character and a stop character, along with multiple rows of Code 128 symbols. Besides the input data, each row additionally contains a subset selector, a row indicator, and a check digit. Rows are separated by a horizontal line. These components allow each row to be read by a Code 128 barcode scanner.
CODABLOCK F barcodes can hold a maximum of 2,725 characters, with each row holding between 4 and 62 characters.