AC O-ring for evaporator to dryer/receiver

[TR Custom Parts]

Anyone know what size O-ring is used where the evaporator goes into the dryer? Couldn't find the size at any of the local auto parts places.

 

[John Larkin]

I bought the multipack of green a/c o-rings at NAPA and used whatever slipped on. I think they were $2 total. Guy at the counter got me what I needed.