Thread Magic Cube.
This tool is designed to make thread more manageable.
It reduces friction when sewing, protects against UV rays, mold and mildew and helps reduce tangling and knotting.
Can be used for hand or machine sewing. Safe for all sewing machines.
This 4-3/4 x 3-1/2 x 1/2 inch package contains two Thread Magic Cubes.
Non-toxic. Acid free.