Genuine Bernina 8 Series Jumbo Bobbin offers 70 % more thread capacity than standard bobbins and pops in and out with the touch of a finger. Sewing speeds up to 1,The Jumbo Bobbin offers 70 % more thread capacity than standard bobbins and pops in and out with the touch of a finger. Sewing speeds up to 1,200 and embroidery speeds up to 1,000 stitches per minute.