Application Identifier 20 is used to indicate an internal product variant of a standard product.
For example, a company may wish to distinguish between two otherwise identical products manufactured at different production sites and therefore uses a product variant in combination with the GTIN.
The product variant may only be used by the brand owner and only in cases where the variation of the product is not significant enough to require the assignment of a different GTIN.
A company must wait a minimum of 12 months before reusing the same product variant for another variant within the same product.
AI 20 must appear together with AI 01 or AI 02.