The ideal bobbin for domestic machines, Fil-Tec Clear-Quilt bobbins are wound on a plastic-sided bobbin shell. Because of this, they are not affected by humidity or oils.
FT-13351 Light Tan (#13351) - Clear-Quilt Bobbins - Class 15/A - Tube of 10 - Kawartha Quilting and Sewing LTD.