getochkn :
you should have looked at the specs, it's all there.
the ST30 is 30mm thick, the UT60 is 60mm thick and the XT45 is 45mm thick.
Sorry I didn't expression clearly
he ST30 which is obviously 30mm thick I know that. but during my research the ST version also have ST45 and ST60 Which is not being displayed in the link I originally post.
so my question is there any different the ST and UT and XT regardless of the thickness?