Question Which soft tubing can bend the tightest?

[Craig C2]

Looking for soft tubing, probably for barbed fittings, so OD doesn't matter. Which can make the tightest bends before kinking?

I've seen anti-kink coils, but I don't think I like their looks. Any alternatives?

 

[Eximo]

Fittings to reach the angles you need before using the tubing would be the ideal.

3/4" ID Car radiator tubing is pretty tough stuff. A bit ugly though. I resorted to that when my first go at tubing kept collapsing.

Since then I have always bought PrimoChill PrimoFlex. The thicker you get the ID/OD ratio the tougher it should be against collapsing, but then it will be harder to force it to take on too tight of a curve, putting stress on the components. With barbs, that could lead to slippage over time without some decent clamps.