Some parts in the catalog have "(Undetermined)" Or "(Undetermined Type)" in their item name. Explanation:
When a slightly different version (type) of a part in the catalog is discovered, the existing catalog entry for that part has to be split up into 2 (or more) entries. If there are any items for sale or items sold under the original catalog entry, that original entry is not deleted from the catalog but "(Undetermined Type)" is attached to its item name because it is not known which version of the item the seller has for sale. The original catalog entry is also typically marked for deletion and when there are no more items for sale or items sold under that catalog entry, it may be deleted from the catalog.