The Apollo is a bobbin hook system from the group of horizontal bobbin hooks and does not require a bobbin case and manages with a low thread tension. For SINGER brand machines with the special Apollo bobbin hook, Prym offers an assorted pack with four corresponding bobbins made of transparent plastic. The great advantage of plastic bobbins is that you always have an overview of the colour of the thread and the quantity remaining and so you can avoid the sudden using up of the lower thread. However, in choosing a bobbin hook the material should always be taken into account, since otherwise rapid wear in the bobbin or the hook might take place.
