Great experience, calculator was key
Needed these for a bench. I tried other spring type shocks to manage the 25lb top but it was not good. Struggled trying to determine which gas shocks to use. Found this site, did some measurements, used the calculator and was able to confidently purchase 2 gas shocks for this application.
Shock arrived with hardware needed. I had to provide screws to attach it to the bench (not an issue). Hardware feels robust and well made.
Install ended up being easy, though it would be helpful to understand how the mounts should placed on the lid and side of the bench. One side was off a little bit an I had to move a mounting point. Small trial and error.
The bench top feels perfect now! Minimal strength needed to lift and close lid. Lid stays open. Family is very happy.