Char Cloth (also called charpaper is linen or cotton cloth that has been combusted in the absence of oxygen.  It is easily ignited by even the weakest of sparks.
It has been used as tinder, often in conjunction with flint and steel, for firelighting for thousands of years.  -From Wikipedia

This char cloth holds a spark long enough to easily ignite any type of tinder - leaves, grass, cotton, magnesium shavings, tinder-quick tabs, etc. Will take a spark from your flint, match, lighter, or fire piston, and hold a strong ember long enough to transfer to your tinder of choice.

You will receive 1 set of FIFTY pieces, in a jewelers bag to keep it from getting wet.  These average FOUR square inches each (2x2) Which is the perfect size to catch a spark from a firesteel style flint, AND hold it for a very long time.  Quality pieces, jet-black (not brown) and free shipping in the U.S. Good luck bidding, and stay safe, and prepared.