This is a 50 yard reel (45 m). The thread has an approximate diameter of 0.006″ (0.15 mm). The colour, Black Satin, is a permanent colour, as it is manufactured from black raw materials. The colour will not fade or come off whilst working.
Fireline is a fused braided thread that is strong and durable, is resistant to abrasion and does not stretch. It is suitable for off loom weaving and many types of bead threading.