# Product Specification Attribute

{% hint style="danger" %}
Before Assigning Specification Attributes, you need to [create Specification Attribute](https://importmanager.docs.foxnetsoft.com/column-mappings/specification-attribute).
{% endhint %}

## Possible Entity Keys

Product Specification Attribute supprots ID, SKU, GTIN, Manufacturer part number or Name of your Product as entity key.

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

## Column Destinations

{% hint style="warning" %}
Below you would find some constants that represent different values for some Column Mappings. Use *these* values in your cells during imports.
{% endhint %}

<table><thead><tr><th width="213">Column Destination</th><th>Constants</th></tr></thead><tbody><tr><td>Attribute Type</td><td>For <strong>Option</strong> use value <strong>0</strong><br>For <strong>Custom Text</strong> use value <strong>10</strong><br>For <strong>Custom HTML Text</strong> use value <strong>20</strong><br>For <strong>Hyperlink</strong> use value <strong>30</strong></td></tr></tbody></table>