The ​​​​​​​Janome Bobbincase Blue Dot 200445007 creates a good tension for free motion quilting and hand look quilt stitches. This bobbincase is marked with a Blue triangle for identification purposes. The ​​​​​​​Janome Bobbincase Blue Dot 200445007 creates a good tension for free motion quilting and hand look quilt stitches. This bobbincase is marked with a Blue triangle for identification purposes. It should only be used in Top Loading Janome models with an Auto Thread Cutter.