What you get: the package includes 4 pieces sewing machine bobbin case, you can change and replace according to your own interest, or share with others Application: the bobbin case is always applied as a replacement part for sewing machines with front-loading bobbin systems, it can also be applied as a spare case Function: bobbins can stop spinning more quickly, effectively preventing unraveling or tangling of bobbin thread when sewing operations stop and start Size: each bobbin case measures approx. 22.75 mm in diameter, can use for most sewing machine, such as applying for Babylock, Bernina, Brother, Elna, Janome, Kenmore, Singer and more Material: the bobbin case is made of stainless steel, that is durable and very practical, can serve for long time usage Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!