Empty sewing thread spools for 50m to 800m and serger machines. The first image shows everything included. The second image shows how they will be packaged. They will be shipped via Yu-Packet Plus. Recommended uses: Convenient for organizing hand sewing thread and embroidery floss. For checking thread tension and test sewing. For dividing and carrying serger thread. Fishing line/rig storage. For organizing wire and fishing line. For school supplies and clothing practice. For photography and display. For crafts. These are used bobbins, so there may be scratches and dirt such as dust. #EmptyBobbin #HomeSewingMachine #ThreadOrganization #TestSewing #EmbroideryFloss #FishingLine #SchoolSupplies