The horizontal bobbin hook is a system which works without a bobbin case and with a low thread tension. For machines with this bobbin type the Prym range offers packs with four of the same bobbins made of transparent plastic in three different sizes. A major advantage of a plastic bobbin is that you always see the colour and quantity of thread remaining on the bobbin and in this way can prevent the sudden failure of the lower thread. Prym provides these sewing machine bobbins for the brands JANOME, BROTHER, SINGER, BERNINA, HUSQVARNA and PFAFF in each corresponding version.Ref. Prym 610 362
