Sometimes the standard AcuFeed Flex twin system is just a little too wide for very fine work. In these cases, you can use the AcuFeed Flex Single System! With it, you can enjoy all of the benefits of AcuFeed when you are creating more delicate or narrow projects. Fits Janome Sewing Machine Models- Category D - ATELIER 9, ATELIER 7, ATELIER 6, ATELIER 5, CM7P, MC15000, MC14000, MC12000, MC9900, MC9850, MC9450, MC9400, MC8900, MC8200, MC8900QSE, MC8200QSE, MC6700P (except MC9900)M Presser Foot Shank Type AcuFeed Presser Foot Type Walking Foot (Even Feed) Foot