What size (ID) is the turbo end of a forge tip?

[footlong]

I've trioed a search but didn't really find what i was after.
What size (ID) is the small end of a forge tip? the end that fits on the turbo is the one i'm after please!

Mucho Graci!

 

[Robbie C]

44mm ID or near as damnit

 

[footlong]

Thanks Rob.