Magna-Glide Black Continuous Filament Polyester Bobbins, Size L

Magna-Glide bobbins are specifically-designed for metal bobbin cases used in commercial embroidery applications. Magnetic core offers uniform tension control throughout the entire bobbin - no more throwing away partially-used bobbins due to erratic tensions! Magna-Glide bobbins have no (or very little) lint buildup, and no overspin or backlash concerns. 130 yards per bobbin, 100 bobbins per box. Black Continuous Filament Polyester, Size L.