They are for ALL Janome models. Part # 202122001 for the blister pack of 5 needles. They are specifically designed to effectively prevent skipped stitches when you are sewing with stretch fabrics; multiple layers of fabric eg quilts; and when sewing across bulky seams eg at a hemline. I have been asked if these are ball point needles? Yes, it has a ball point tip but also have a COBRA HEAD which opens up the fibers of the fabric allowing the needle to pierce thick layers, tightly woven fabrics or “difficult” stretch fabrics with ease. The needle actually goes between the fibers.