All 36 Alphanumeric, plus - . Each Code 39 symbol consists of a leading quiet zone, a start symbol character, symbol characters representing the data, a stop symbol character and a trailing quiet zone. Each Code 39 symbol consists of a series of symbol characters, each represented by 5 bars and 4 intervening spaces. The unique start and stop character is used to identify the leading and trailing ends of your barcode symbol.
Quiet zones are spaces preceding the start character and following the stop character.
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