Copper tubing - which one?

i’m thinking of making an IC, which of these would you choose? Obviously, i want the cheaper one but not sure why it’s cheaper…quality difference maybe?

The interior of refrigeration tubing has to be cleaned of impurities so not to contaminate refrigeration circuits. It is also likely thicker walled to withstand the high pressures of refrigeration systems.

does that mean you would or would not select the refrigeration tube for an immersion chiller?

The cheaper. Who cares how dirty the inside is. Beer only touches the outside

thanks

[quote=“Cran”]The cheaper. Who cares how dirty the inside is. Beer only touches the outside[/quote]This ^^

And thinner tubing will transfer heat better.