Magna-Glide Classic White Bobbins M Style Metal Bobbin Pre-Wound

Magna-Glide Classic White Bobbins — M Style Metal Bobbin Pre-Wound. The standard pre-wound M-size metal bobbin for longarm machines using the traditional metal M-style bobbin format. Wound with Glide 40wt polyester thread under consistent machine tension for reliable, reproducible stitch quality. White is the most universally applicable bobbin color, serving as the standard neutral for white, cream, light grey, and most light backing fabrics in production quilting.