Replacing AC condenser, what size are the two O-rings?

[sdowney717]

I ordered a Spectra condenser from Rock Auto.
I put a scratch on the flat tubes. I sprayed soap, dont see any bubbles, but the AC wont hold a charge now.
Leaks out in 5 minutes of running.

 

[sdowney717]

I did find out the Santech 2520 O-ring pack fits the Contour AC, so I got one off Ebay
I was tempted to buy a huge oring kit from Amazon, but what if none of them are the right size.

Where does the real odd large one go?