# Cross-sell product

## Possible Entity Keys

Product supprots ID, SKU, GTIN, Manufacturer part number or Name as entity key.

{% hint style="warning" %}
Your entity key must be unique. If you have two categories with same Name fields, you will not be able to use Name as entity key.
{% endhint %}

## Column Destinations

<table><thead><tr><th width="231">Column destination</th><th>Explanation</th></tr></thead><tbody><tr><td>Key (Product Key)</td><td>The value that you selected as entity key for this template.</td></tr><tr><td>Cross-sell product key</td><td>Product Key (that you selected as entity key for this template) of Cross-sell product.<br><br>You can specify <strong>multiple cross-sell products</strong> in one row using | (vertical bar) symbol. Example, <strong>001|002|003|004</strong> would add 001, 002, 003 and 004 products as cross-sell products.</td></tr></tbody></table>


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