a uniquely identifiable line within a product range. A particular product may have many different variations e.g. 20 percent extra free, price marked etc. each of these variation would be a unique SKU.
STOCK KEEPING UNIT (SKU)
Meaning of STOCK KEEPING UNIT (SKU) in English
Raynet Business and Marketing English glossary. Английский глоссарий компании Raynet Business and Marketing . 2012