Smoke Grey Fireline 6lb / Size D, in the 125 yard spool!
An absolute must-have for the avid beader.
It fits a size 10-13 beading needle just fine.
Great for use with highly abrasive materials such as Swarovski Crystals, and Czech Bugles.
Technical details below:
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 beadworking.