144 (1 Gross) Prewound Plastic Sided Machine Embroidery Bobbins Size A Style 15J SA156 Size "A", Style 15J, 130 Meter (143 yards) White, 100 % continuous Polyester Filament Same size as Brother SA156 embroidery bobbins. Bobbins will also fit all Janome home embroidery and sewing machines as well as most Singer embroidery machines.