O-Ring For Expansion Valve

Great. Only wish that I'd been told I needed it

My only issue is that I was told I should replace my expansion valve's seat and not told that I should also replace the o-ring (my old o-ring was virtually invisible - I didn't even know I had one). The result was a delay of about a week to ship to the West Coast and paying full shipping rate for something that could have gone in a letter.

Wrong

Part didn't fit my machine!