The Class 15 (A Style) Bobbin 10 pack:
The Class 15 bobbin is about the size of an American nickel. This bobbin diameter measures approximately 20.3 mm and has a width of approximately 11.7 mm. This bobbin has two flat sides and is available in both plastic and metal. This bobbin suits 95% of the current machines on the market, including Brother, Bernina, Juki, Elna Janome, Pfaff, Husqvarna and more!
This pack contains 10 units of bobbins