Air bag height

[ddz1952]

I didn't know if I should post this here or someplace else. I've got a 2004 Newmar KSDP on a Freightliner chassis. We're going to start flat towing a lifted Jeep TJ Wrangler . I know about keeping the motorhome and the toad at approximately the same height. Here's the problem, I've got the MH in storage and don't want to go start it up, fill the building up with exhaust, not warm up the motor to operating temp etc.
Can someone tell me about how high the airbags lift up the coach? I'm guessing approximately 4" but I don't know for sure.
Are there any for sures out there?

[Gary RVRoamer]

I would assume it is a bit higher than that, maybe 6". The reason is that its OK if the toad is a bit low on the towbar, but you don't want it high.

My coach isn't here either - it's at a cabinet shop for some improvements - so can't measure it for you.