If you go to the Customize Diamond Feed Data in this page http://www.rapnet.com/RapNet/DownloadListings/download.aspx

You will see you can add tow columns for pairs “Is matched pair separable ” and “air Stock # ” the first one will tell you if it is a pair and the second will give you the match stock number

Please note! to sure it’s a pair it needs to be from the same seller

Regards,

Ahaliav