To be short, what it is?
(including tension ring)

 

Don't know, but I think I've got one so I'll measure it tonight when I get home.

 

That would help my situation great tons!

 

Here you go, ID is 28.9mm from sides of tension ring fitted in crystal.

 

Thank you so much

 

Thank you also from me!

 

This just me as well! good information doesn't get old.

 

For anyone curious, I measure 30.68 for the inner diameter of the crystal *without* the tension ring.

This might be useful for sizing a tension ring.