The Janome Bobbincase Yellow Dot 846652607 is set to a higher tension. than normal. Use it with any Janome embroidery model listed below. It is a good idea to carry out a few test samples using this bobbincase, before any important work. Use good quality embroidery threads and needles to help achieve good results. This Janome bobbincase will fit the following models, MC9900 MC500E MC550E MC400E ATELIER 9
