Air Ride seat contraption on JD.

[Deere Dude]

I was adjusting my air ride seat on my JD 3720 and came across this little thing in the front edge of the seat.

It is about 1.5" long and the tube spins freely spinning it with a finger; no resistance.

Does anyone have a clue what it is and does, if anything?

 

[Pig Fab]

Supposed to be a weight/height indicator. You air the seat up until it shows the correct weight, yours is apparently broken though.
Just air it up until it feels right.

 

[Deere Dude]

Supposed to be a weight/height indicator. You air the seat up until it shows the correct weight, yours is apparently broken though.
Just air it up until it feels right.

Thanks a lot.