1.Material: Made of plastic; Color: transparent. Reusable, you can use for a long time. 2.Application: Compatible with all common household sewing machines.such as 3.Function: A practical tool for home use, better organize your sewing thread. 4.Quantity: 25 Pieces sewing machine bobbins without thread and a plastic storage box. 5.Advantage: Simple design tt meets the requirements of sewing, the bobbin can help you sew clothes faster. Material: Plastic Height: 10 mm Inner diameter: 6 mm Outer diameter: 20 mm Package Contents: Package: Package 1: 25 x Transparent Sewing Machine Bobbins Package 2: 25 x Multicolor Sewing Machine Bobbins High quality: 1. The sewing machine bobbins are made of premium plastic material, not easy to deform and break, durable and reusable. 2. This sewing machine bobbin s a smooth edge, it rotates smoothly without breaking the thread, and the thread can be easily wound on it. Easy to use: 1. Simple design style will meet your sewing needs; easy to thread and use, can help you finish a project or make clothes quickly. 2. 25 pieces sewing machine bobbins with 1 plastic storage box, can protect the bobbins from falling, convenient to use and store. Wide range of use: A practical tool for home use, better organize your sewing thread.