Help needed identify part (heater)

[Surgeonlove]

Hi Guys:

I need to replace a heater hose but I want to be sure to order the right part. What I need is a flex hose that is connected under the dash inside the car like in the left wing and goes trough dashboard and connects to the heat box (under the wiper motor) The inside of the hose looks like aluminium and exterior like cardboard. The diameter is 2 1/4 in. What pelican is selling is more rubber hose. can it be changed to rubber? Can someone poit what part number it is on Pelican.

thanks

Pierre Carl