Rear window and trunk lid hydraulic struts

[Carbon98916]

I have a pair of each of these that I would like to sell and was wondering if there was an accurate way to test these when they are not mounted on the car??? They are tough to compress by hand but will that be sufficient enough to hold up the trunk ?

Thanks

 

[Spoolinfool]

If they are used they have likely lost pressure. Even if they are unused through time gas leaks past the seals.Its not worth selling without testing them mounted because old ones will still have alot of resistance by hand but will fail with the weight if the glass or trunk with spoiler.

 

[centerpunch]

They just barely work then they're brand new.