This set includes two types of 3D printed embroidery floss bobbins: one designed to hold a single floss and another for organizing two different floss colors. The single bobbin is perfect for storing individual threads neatly, while the double bobbin helps keep two colors easily accessible and well organized. Both bobbins feature smooth edges to prevent tangling and provide ample space for managing your embroidery floss efficiently. Perfect for DIY crafters looking for a simple and functional thread management solution.