Tabriz Orchid (#60252) - Magna-Glide Classic - M Size - Box of 72Fil Tec Magna Glide Classic pre wound bobbins in Tabriz Orchid (#60252) offer clean, consistent tension with every stitch. Each bobbin features a cardboard core and built in magnet that ensures smooth delivery and optimal consistency from your bobbin case. Tex. 12; 60 wt. polyester thread for balanced tension and smooth stitching Low lint design keeps your bobbin area cleaner Magnetic core helps maintain correct tension in metal bobbin cases