I'm about to make a similar stuff for my arca Fline 69...

i'm interested in the tha that it is double folded !
i just need the size of the inside window, i mean the hole between the two bellows.

Thanks



"Wide angle "Bag" bellows for Linhof M679 and M679CC 6x9cm view cameras. Double folded, for extreme extension.
For use with lenses of 28-90mm focal length."