janome embroidery machine hat hoop for mb-4 janome the janome mb-4 embroidery hat hoop is made specifically for the janome mb-4 embroidery machine. the janome mb-4 embroidery hat hoop measures 110mmx60mm embroidery field. the janome mb-4 embroidery hat hoop allows you to embroider on baseball caps with ease with the built in area to secure the bill of the hat in place. enables embroidery on hat fronts, sides, and backs. new upgraded software v1.10 for the mb-4 includes the h1 hoop option. by selecting this option, the design is automatically rotated for the hoop