The set comes with 25pcs empty sewing machine bobbins in storage box, which are made of durable iron material for practical use. You needn’t to search the bobbins everywhere anymore, because the transparent case has well organized your bobbins, and the case also protects your bobbins from physical and chemical harm. Features - ColorAssorted Color - Material: Plastic. - Size: Approx. storage case12x9.7cm, bobbin outer diameter 2cm,inner diameter 0.65cm, bobbin height 1cm. - 25 Pcs bobbins and 25 assorted colors sewing thread is enough to use for a normal daily using. - Those bobbins are suitable for domestic sewing machine. - The 25 assorted colors which is various color, and the color would meet your various requirements. - The set comes with a storage case, very organized with each bobbin in a separate spot and easily to see which color to choose. - Each bobbin with one compartments, easy to remove and use. - Perfect for anyone just starting out with an embroidery machine or a sewing machine. Package list: 25 x Sewing Machine Bobbins