[Product description] 

Keep your bobbins organized with Mr. Bobbin.
Stores both top and bottom threads together. Keeping the same color and type as a set saves time searching and improves work efficiency!
Insert the thread end into the gap at the top to prevent fraying.
Comes in a convenient zip bag for storage.

[Notes]
Compatible with standard home-use bobbins. Not compatible with overseas or industrial bobbins.