6 lb./ Size D Fireline braided bead thread. This is a new gel spun polyetholine braided and pre-waxed bead thread with an extremely high tensile strength. The strongest fiber per diameter ever created. 6lb test, .008" diameter, Black Satin color, 50 yd spool. You will receive one spool, perfect for seed bead work and other handcrafted jewelry designs. Excellent use with heavy or sharped edge beads. This is what our designers use.