Malcolm--
Each wick is made using 2 strips of 2" x 24" wicking, 1/8" thick. So 96 square inches of wicking. The wicking is fairly loose on the tube-core wicks (and on the interleave wicks, too). So I don't think soak-up was a problem, although I did not determine just how much fuel they each soaked up. Maybe next time--that would be worth finding out. I have weighed wicks before/after soaking on a different occasion, and found that the tube-core wicks seemed to soak up about 1 oz more.
When you ask "how long does it last," I assume you are asking how many light-ups. That I don't know.
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Adam Rice :: www.fire-gear.com
[This message has been edited by adamrice (edited 26 January 2001).]