Janome Bobbins - Pack of 10 are suitable for all Janome sewing machines. There are no generic plastic bobbin that fit all makes of sewing machines, consequently there are several different sized bobbins on the market. Using the incorrect size and type of bobbin in your machine can affect stitch quality and could possibly cause damage to your bobbin case and machine. Only use Janome bobbins in your Janome machine and never use metal bobbins in top loading / drop in bobbin sewing machines.