Years ago, I was in a department store. They had "tire
pressure gages" for $1.99, and next to that was "Radial tire
pressure gage" for $2.99.

Might be the same concept.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"mm" wrote in message
news
It would exist so they could charge more money, so builders
could
impress customers.

Or maybe they don't exist and they just make the same
bricks, with a
different pattern, and call it firebrick, so they can charge
more
money for it.

I'm sure someone can think of more.