Metal/Magnetic Hoop And Same size hoop as the SQ20B. Hoop Hooping ready-to-wear garments is difficult or impossible due to seams, narrow areas or buttons/rivets. When using the Metal Hoop wont be a problem when you want to embroider quilts or other projects where you do not want residuals from stabilizer on the back side, the metal hoop is perfect! SQ20B Large embroidery hoop measures 7.9" x 7.9" (200mmx200mm) This Generic Hoop is the Same As the Janome Part model #864412001 This hoop will work with the Janome Memory Craft MC550E, MC500E, & The Elna Expressive 830 and MC400E.