250Z 250z probe oring size?

[BSJ]

What's the 250z probe oring size?

Not seeing the probe on the exploded views I have...

 

[Freddy J]

Just had to replace mine. Had to search thru all the o-rings to find one that fit and didn't blow out. Didn't measure it so I'm not much help. The drawing and parts list aren't very helpful either.

 

[cosmic]

I believe it has the o ring on or in the intake sleeve or thimble,, #17 5.5x1.5 #18 10x1.5.