Heater /vent ducting

[Frederick]

Hello, was wondering what is the source or substitute for this old tubing.

 

[Redrumm3]

I don't know the diameter of the tubing needed, but I've used this before in other applications:

https://www.jbugs.com/product/028129087A.html

 

[Dan Wood]

If you are not a purist, you can use aircraft duct tubing.

Vena Mtd (CEET Equivalent) Flexible Aircraft Ducting - Cut To Length | Aircraft Spruce

Vena Mtd (CEET Equivalent) Flexible Aircraft Ducting - Cut To Length Ducting used to convey air or gaseous fluids at medium temperatures and with high resistance to aging.

www.aircraftspruce.com

Vena Mt (CAT Equivalent) Flexible Aircraft Ducting - Cut To Length | Aircraft Spruce

Vena Mt (CAT Equivalent) Flexible Aircraft Ducting - Cut To Length Ducting used to convey air or gaseous fluids at medium temperatures and with high resistance to aging.

www.aircraftspruce.com

 

[Frederick]

Thank you both for you reply. I am likely over-thinking some things. Of course VW used the same or similar size material. this certainly will work. From the cite Redrumm3
posted.
The EMPI VW Heater Hose for Type 3 Volkswagens is 63mm by 1000mm, contains no paper, and is made out of flexible aluminum flame resistant to 450 degrees. Reference part number: 616 211 29501.
The aircraft duct would work but at10X the price. I measured and ID is as close to 63 as I could tell with the old tube.
Thanks again . Love this Forum.

 

[Frederick]

Ordered the VW duct, will advise how it works out.