Violet Prewound Bobbin Magna Qlt M. Fil-Tec Magna-Quilt Prewound Bobbins Egyptian Long Staple Mercerized Cotton No. 50 (Tex 24). Has the look of cotton but has the strenght and colorfastness of polyester. The magnetic core rotates the bobbin consistently throughout the entire bobbin wh... - Violet Prewound Bobbin Magna Qlt M. |