<p> What you get: The package includes 4 pieces, a sewing machine bobbin case that you can change and replace according to your interests, or share with others </li> Application: robbin case is still applied as a spare part for sewing machines with front loading spool system, it can also be used as a spare case </li> Function: Bobbins can stop spinning faster, effectively preventing the bobbin thread from unwinding when sewing operations stop and start </li> Size: each bobbin case is approximately 22.75mm in diameter, fits most sewing machines, such as Babylock, Bernina, Brother, Elna, Janome, Kenmore, Singer, etc </li> Material: The bobbin case is made of stainless steel, durable and very practical, can be used for a long time </li> </ul> <b> Product description </b> <br> Applications: <br> Application: <br> The robbin housing is always used as a spare part for sewing machines with front loading spool system. It can also be used as a spare case. <br> Function: <br> The spools can stop turning much faster, effectively preventing the bobbin thread from winding or tangling when sewing operations stop and start. <br> Specification: <br> Material: stainless steel <br> Size: approx. 22.75 mm diameter <br> Color: silver <br> Quantity: 4 pieces <br> Package includes: <br> 4 x Bobbin cases <br> Note: <br> Please check your sewing machine model before purchasing. <br> The marks mentioned above are not applied as marks, just for compatibility reasons. <br>