Features: Sewing Bobbins Size:sewing bobbins diameter 20mm/0.79inch, height 10mm/0.39inch, center hole diameter 6mm/0.24inch. Application: Suitable for sewing factory, household sewing machines, sewing thread collection and induction, DIY and other project. Sewing Machine Bobbins Material: High strength plastic material sewing bobbins have a longer service life and can be reused. Assorted Colors: Each set has 30pcs bobbins, and assorted in different colors bobbins sewing thread group optional, multicolor. Quantity: Enough for yours daily needs on DIY embroidery and sewing. A good product that should put on the side of your sewing machine. Specifications: Material: Plastic Color: As The Picture Shows Style Options: 15 Style are Available as Shown in the Picture. Diameter: approx.20mm/0.78in Package Includes: Set of 30Pcs Bobbins and Sewing Thread note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!