此条码在外观上有四框。主要用于外包装箱的条码
DUN-14（Distribution Unit Number）不是一个真正意义上的条码类型。它是为使用集装箱使用其他条码符号的一种编码系统。DUN采用的条码类型为ITF 或者EAN 128,现在设施使用EAN 128条码类型。DUN-14条码可采用ITF 14或EAN 128条码类型制作。
DUN-14（Distribution Unit Number）不是一个真正意义上的条码类型。它是为使用集装箱使用其他条码符号的一种编码系统。DUN采用的条码类型为ITF 或者EAN 128,现在设施使用EAN 128条码类型。DUN-14条码可采用ITF 14或EAN 128条码类型制作。
以下为DUN-14英文介绍：
DUN is not really a barcode type. It’s a Distribution Unit Number. However, it is frequently constructed from 12/13 digit retail barcode numbers, and uses a special check digit.
DUN-14 numbers may be represented by ITF or EAN 128 barcode, and modern implementation should use EAN128.
DUN-14 in EAN128 barcode form may be created by providing 13 digits (the Logisitcal Variant digit – normally 0 in the UK) followed by the first 12 of the retail digits (eg. from EAN-13 numbers but without EAN's check digit). The DUN check digit is then calculated and the barcode symbol produced using EAN128 symbology.