Dritz Plastic Class 66 Bobbins 4 Count 930. Class 66 Bobbins. Four top drop-in bobbin cases. Consult you sewing machine manual to determine type of bobbin needed. Fits some the following machines: Singer, Baby Lock, Brother and Simplicity. Consult your sewing machine manual to determine type of bobbin needed. CHK-930
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Item# : SPM15934643028
Model # : CHK-930