GAZ CAPRI STRUT INSERT, MEASUREMENT FROM BOTTOM OF THREAD TO COLLAR SHELF ON INSERT

Can anyone help me as my Gaz inserts are already in my car, 
 
im just wanting too know what the distance from the bottom of the thread at the top of the insert is too the shelf of which the strut top sits on, 
 
does anyone have some they are yet too set up that they can assist me with, 
 
Cheers Glenn