P610706 Prym Thread bobbins. These bobbins made of robust white plastic make it easy to see the embroidery thread. As they have no sharp edges they are perfect for winding left-over strands of thread. Simply organize them into the embroidery box and the various colours and thread types will be stored and easy to see. There is space at the top of the thread bobbin to note the respective colour numbers with a permanent marker. 610706 30PC