How to determine which air bags are installed?

[Brianpaul77]

Our beast has Airlift bags installed between the leaf springs on the front, but they are completed deflated and due to disconnected hoses, i can't determine if they'll hold air.  I don't believe they were intentionally disconnected, as it appears the hoses that went into the valves has just degraded and came loose.  I'm considering getting new hose and fittings to see if i can get them hooked up again, though I'm sure the bags are probably shot.

So my actual question, how do i determine which bags were installed?  I can't see any indication of P/N or any other identifying info.  I'm aware if they are the originals, that the front kits and parts are no longer available, but I'm hoping perhaps the PO already dealt with that and maybe they are newer.