Berkley Fire Line (Beadsmith) SMOKE 8LB/.009 IN/50YD Spool Braided Bead Thread.
Bead Smith's Fireline is a pre-waxed, braided cord consisting of gel-spun polyethylene,which is known as the strongest fiber, per diameter, ever created. It has an unbelievably high tensile strength and has been recommended in numerous how-to articles on bead working.
The 6 & 8 lb. tests will fit a #12 English beading needle.