Typically Sold individually.  Most APQS machines use two pigtail thread guides on each unit.The easy-threading pigtail thread guides help position the thread directly in line with the needle's eye for proper stitch formation. As some thread types can be abrasive (such as metallic or invisible thread, or strong or coarse thread types) it's a good idea to have a few extra pigtail thread guides on hand as spare parts. This part fits all generation models.