I replaced all of mine with SCAT hose from aircraftspruce.com. Looks better, lasts longer and is easier to work with. SCAT and SCEET hose is higher temp, red and good up to 550F+. They also have CAT and CEET hose, which is black and good up to 350F+. Either should be fine for that hose you're talking about.
Check here if you're interested:
Ducting from Aircraft Spruce
My heat system has been backdated so I don't have that hose, but here is what the SCAT looks like on mine:
