Usage Tips:Comprehensive Package: the package includes 10 of bobbins and 1 shuttle bobbin case; With our sewing bobbin case and bobbins pack, you will have plentiful supplies for all of your sewing creations Quality Material: crafted from durable iron and steel, the sewing bobbins and bobbin case offer long-term durability; Invest in quality sewing machine accessories that ensure smooth performance for every stitching project you undertake Optimal Size: with bobbins measuring 33.2 mm in length and a shuttle bobbin case at 48.8 mm, they are designed to provide the great fit for a variety of sewing machines; Experience ease of disruption-free sewing Compatibility: these sewing bobbins and bobbin case are compatible with singer models 27, 28, 127, 128; Elevate your sewing with accessories that enhance and complement your beloved machine Ideal for Multiple Projects: these sewing machine accessories are versatile and suitable for a breadth of sewing endeavors; Whether you're working on quilting, garment repair, or DIY craft projects, they are your reliable assistants Colour:As Shown Material:Silk cloth Package Contents: 10 * bobbins 1 * shuttle bobbin 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.