Threads used for general rod building.
Coated with epoxy will darken the color (if the fabric gets wet, the color becomes dark. ) It gives you a sense of transparency.
Can also be used to make assist hooks and rubber jigs.
Size A is narrow, size D is thicker. Available in 36 normal colors and 4 fluorescent colors, 100 yd length (about 91 meters)
Spool shape may vary.