Plastic bobbins made of lightweight and practical transparent PP plastic, flat shape with smooth finish. Package includes 500 PCS bobbins and 1 pack dental bobbin winder. Dental bobbin size: 1.5 inch in length and 1.4 inch in width; Bobbin Winder Size: 3.5 inch This bobbin winder is hand crank operated, easy and speed up winding. Widely use embroidery bobbins can help you organize and unwind the remaining, keeping the remaining, skein, washi, untangled. Color: transparent Material: plastic Package Contents: 500 PCS Bobbins 1 Pack Bobbin Winder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.