Magna-Glide Delights Style M Jumbo Pre-Wound Bobbins 132 yds - Blaze # MGDM-91505-F - 10 Pack
Filament Polyester . Fil-Tec Bobbin central's patented magnetic core creates consistent delivery through the entire bobbin. No more interruptions for tension adjustments as your bobbin gets smaller. Magnetic core prevents backlash or over-spin and eliminates the need for backlash springs. Magna-Glide is the original high-yield magnetic-core bobbins. These are Style M Bobbins. There are 10 Per pack.
