rear A/C lines

[Norstar]

2011 LX 570

I have leaks in the rear A/C lines and or rear evaporator. Expensive fix

I have found an option to cap the rear lines. I don't live in the south so willing to try using just the front unit. To order the parts for the 2 lines I need the outside diameter of the 2 lines going to the rear.

Anyone know what they are?

Thanks!