DRITZ-Plastic Class 66 Bobbins. Fit in some of the following machines: Singer, Baby Lock, Brother & Simplicity. They are not compatible with Bernina, Elna, Husqvarna/Viking, Janome/New Home & Pfaff. Consult with your sewing manual to determine type of bobbin needed for your machine. This package contains four clear plastic bobbins. Imported.