An SKU or Catalog # is the unique number you use to track a specific item in your inventory. These numbers allow us to sync the correct items across marketplaces and/or to track all changes made to an item. If you have SKU or Cat #s, simply use them on your Ronati listing.
If you do not already have SKU or Cat #s, you can create unique numbers for each of your items. These numbers can be alphanumeric.