PINK BOBBIN BOX - which will fits the 4, 5, 7 & 8 Series Black Jumbo Bobbins - 25 Slot Anti crack box with a foam insert which will fit 25 jumbo bobbins class M bobbins. Fits most size bobbins up to 25mm/1in diameter. Box dimensions: 19 x 9.5 x 3cm (7.5 x 3.75 x 1.2in) Designed to fit the NEW MODELS THAT TAKE A JUMBO BOBBIN ONLY 4, 5, 7 & 8 Series