Product Mix .

Marketing has marketing mix , and promotion has promotion mix also product has product mix .
Product Mix is all the products offered for sale by an organisation , and Product Mix also mean the variety of product lines that a company produces, or that a retailer stocks . Product mix is sometimes called product assortment.
In product line we have four qualities ( length , breadth , depth and consistency ) .

Length : mean the number of products in the product line .
Breadth : mean the number of product lines that a company offers .
Depth : mean the different varieties of product in the product line .
Consistency : the relationship between products in their final destination .

In usual Product mix refers to the ( length,breadth,depth and consistency ) of product line .