1 Gross/ 144 Prewound Plastic Sided Machine Embroidery Bobbins L Size! Similar to Neb/ Sa155 Black These embroidery bobbins are similar to NEB brand bobbins. Size "L", 130 Meter (143 yards) Black, 100 % continuous Polyester Filament Same size as Brother SA155 embroidery bobbins. These bobbins are used in most home embroidery machines.