The set contains 10 clear plastic bobbins measuring 11.5 mm, ideal for pre-winding embroidery thread and storing multiple sewing thread colors for various projects. Made from durable, reusable plastic with a secure notch that helps maintain smooth and consistent thread winding. Transparent design allows quick visibility of remaining thread, making it easy to check when a refill is needed. Compatible with many sewing and embroidery machines, suitable for those searching for replacement bobbins, thread organizers, or accessories for sewing and embroidery work. This set includes 10 clear plastic bobbins measuring 11.5 mm, ideal for prewinding embroidery thread and organizing multiple sewing thread colors for different projects. Each bobbin is made from durable, reusable plastic with a secure notch that helps keep thread winding smooth and consistent. The transparent design allows easy visibility of remaining thread, making it simple to know when a refill is needed. Compatible with many sewing and embroidery machines, these bobbins are a practical choice for those needing replacement bobbins, thread storage, or accessories for sewing and embroidery tasks.