Please note that this requires access to Product Export which is only available in plans which include Campaign Managers.
The Product Exporter can be used to generate a .csv file of your product data feed based on the attributes imported into your Sales & Orders account.
To perform an export:
Select your desired fields to be included in the .csv file
Click 'Export Products'
This can be greatly helpful for users with API or complex feed file uploads to be able to have a manageable file type for your product feed(s).
Additionally, you can use Product Exporter in conjunction with the Margin Tool by using the external_id export to ensure your IDs match up for the Margin Tool file upload.