Madeira 308-509-B MADEIRA MAGNETIC BOBBIN L BLACK

Madeira's magnetic-sided bobbins have consistent tension through out the life of the bobbin. 

These L style bobbins are pre-wound that are magnetic-sided on one side and paper-sided on the other side. The magnetic side helps prevent back lash and provides a uniform tension. The continuous polyester filament helps reduce lint build-up in metal bobbin cases. Each bobbin has 134 yards of continuous polyester filament thread. Contains 144 per box. Available in white and black.

Specifications: 

• Madeira magnetic-sided embroidery bobbins
• Continuous filament
• Magnetic sided 
• Pre-wound
• Polyester
• Style L
• Black
• 124 yards per bobbin
• 144 bobbins per box

Please note, for best results, remove anti-back lash springs from bobbin cases with them when using magnetic bobbins.