Sewing Machine Spool Box Stainless Steel Spool Box For Front Loaded Class 15 Machines For Household Sewing Machines What you will receive: The package contains 4 pieces of sewing machine spool box, which you can replace according to your own interests, or share with others. Application: The spool box has been used as a replacement part for sewing machines with front loading spool systems, it can also be used as a spare box Function: The spool can stop spinning faster, effectively preventing the thread from falling off or tangling during sewing operations. The spool stops and starts Size: Each spool box size is about 22.75mm in diameter, it can be used for most sewing machines, such as Babylock, Bernina, Brother, Elna, Janome, Kenmore, Singer, etc. Material: This spool housing is made of stainless steel, durable and very practical for long-term use