10 Pack Singer Class 15 Aluminum BobbinsDescription:Pack of 100 Singer Class 15 Aluminum Bobbins. Bobbin #2518A.Bobbin diameter measures 20mm and 11mm thick.These bobbins fit Singer models 15-30, 15-88, 15-90, 15-91, 31-15, 44, 233, 237, 239, 331K, 431D
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10 Pack Class 15 Bobbins #2518-A
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