diff breather size

[Bohica]

As I have a few days until the new A pillar trim arrives, what is the diameter of the diff transfer case and gear box breather hoses. I may as well extend them.
Thanks
Julian

[AK83]

looks like it's 6mm/4mm (OD/ID) going form some historical info found here.

Differential Breather Kit (https://www.aulro.com/afvb/discovery-2-a/83213-differential-breather-kit-2.html)

D2 diff breather insert size. (https://www.aulro.com/afvb/discovery-2-a/162939-d2-diff-breather-insert-size.html)

Hopefully it's right.

[Bohica]

Thanks
That is very useful. I have some 4mm and 6mm tube, and connectors.