Definitely air shocks with a sleeve:
https://www.amazon.com/Air-Lift-75566-Sleeve-Shock/dp/B005DJ92MK/ref=asc_df_B005DJ92MK/
I don't know the application for something that large. Not a car. Maybe a truck? Could even be for a non-automotive use like tilting a stage, etc...
They look new and they look expensive. Congrats on the nice donation!