Fuel filter o ring question

[dmage]

Anyone know the size of these o rings? Rippin out the fuel filter and I'm sure the o-rings ill find will be crusty. I'll go out and buy a ring kit but need to know whether to get the SAE vs MM kit. thanks!

 

[Caman96]

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[GoToGuy]

Where are you working? There's probably six different sizes. Pretend we're all blind working in the fog. What year, what engine? Gas, diesel ? " Accio O rings"
You could also just look it up on " GM parts giant.com" . Or even " AC Delco.com" .
It's not difficult.

 

[dmage]

To complete the thread, I didn't see an o-ring on the line, line was flared. It was a 1996 gmc c1500 4.3L