144 Prewound White Thread Plastic Sided Machine Embroidery Bobbins for Brother Sa156 also known as Size "A", Style 15, Class 15 Bobbins 130 Meter (143 yards) per bobbin White, 100 % continuous Polyester Filament Same size as Brother SA156 embroidery bobbins Bobbins will fit all Janome home embroidery and sewing machines as well as most Singer embroidery machines