Steady Stitch Magnetic Core bobbins provides a steady, even flow of high-quality continuous filament polyester thread which allows you to stitch to the last inch of thread. Pre-wound bobbins with Style 70D/2 polyester thread.
For cylinder arm machine models only.
Style L / White / 144 bobbins per box / 145 yd per bobbin
Style L / Black / 144 bobbins per box / 124 yd per bobbin