http://www.brakehorsepower.net/phpBB3/viewtopic.php?f=4&t=631&p=5386&hilit=Hoses#p5386From Think Automotive
Aeroquip TFE Racing Hose/Aeroquip 666 Aerospace hose/Moquip TFE hose
"Due to its very low ratio of expansion to pressure, this hose has
proved to be ideal for use on flexible lines in competition vehicle
braking and clutch systems providing a desirable “hard” pedal with
re duced travel. It does not con form to existing standards laid down
for normal road vehicles, if subjected to continuous flexing the
stainless steel strands will eventually fracture and could penetrate
the Teflon liner, how ever this eventuality does not occur within the
normal life of a competition vehicle, this hose in common with all
other components used on such vehicles should be regularly in -
spected for signs of wear."