6 LB test, size D. Fine. .006in/.15mm average diameter. 300 Yard / 274 meters. Finally - available in black! About time!
Fireline is a pre-waxed, braided cord consisting of gel-spun polyethylene which is known as the strongest fiber, per diameter, ever created, so we are told - claims about spider silk and nanotubes notwithstanding. It has an unbelievably high tensile strength and has been recommended in numerous how-to articles on beadworking. It will fit a #12 English beading needle. You need super sharp scissors to cut, my preference is for the flush cut wire cutters.
Black Satin Fireline is a permanent black color, manufactured with black raw material. It is not a coated or dyed product. No color will come off while using.