Easy to store: Our sewing machine metal spools are packed in a plastic transparent box, and each spool is placed in a separate position, which is very neat, easy to store and access,dust-proof and loss-proof. Perfect material: Spool made of high quality metal, durable , practical, reusable. Exquisite workmanship: The surface and edges of the spool are polished so that the smooth surface and edges will not cut , and will not scratch your fingers or skin. Reliable and reliable quality. Bobbin specifications: height 1cm, diameter 2cm, inner diameter 0.7cm Wide Application:The standard size to fit most home embroidery and sewing machines.It is a for grandma, mother, wife, sewing lovers, sewing beginners. Colour:silver Material:Metal Package Contents: 50 x Bobbins 1 x case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.