Need size & source for clear hose

I am having some challenge finding proper clear hose for the 1/12 Wolf. This is the clear hose going out from the oil tank back to the catch tank on the rear wing structure. I have ordered several types from Small Parts but their stuff is not metric and I am not finding the correct size. Usually, these are too thick on the outer diameter.

Consider using clear flexible solid rod instead of clear hose or tubing. The hoses I've scrounged around for were always out of scale and made the model too toy like.

You can even use Lexan rods which can be bent with a little heat.

Hope this helps

Heat stretch some clear sprue- you can make it any diameter you want.

Or try fishing line.

Visually, I doubt there would be much difference between solid and tubing- at least not for smallish diameters.