Easy to store: Our sewing machine metal spools are packed in a transparent plastic box, with each spool placed in a separate compartment for neat organization, easy access, and protection from dust and loss. Perfect material: Made of high-quality metal, these spools are durable, practical, and reusable. Exquisite workmanship: The surface and edges are smoothly polished to prevent cuts or scratches, ensuring safe handling. Reliable and consistent quality. Bobbin specifications: Height 1 cm, diameter 2 cm, inner diameter 0.7 cm. Wide application: Standard size fits most home sewing and embroidery machines. Ideal for grandmothers, mothers, wives, sewing enthusiasts, and beginners. Color: Silver Material: Metal Package contents: 50 x Bobbins 1 x Storage case Note: The package includes only the items listed above; other products are not included. Note: Due to light reflection and differences in display screens, the color in the image may vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.