Gütermann fusible thread melts under the heat of an iron. Utilize to eliminate pinning and hand basting in many applications, such as matching plaids, applying appliques, trims, pockets and positioning a zipper. Use in the bobbin. Can also be used in the lower looper of a serger. White spool colour. TKt No. 30, Tex: 95, Dtex: 950, 2-ply. Suggested needle size: US 16/19 (100-120).