Ivan Vegvary wrote:
I have two identical office chairs. The air-shock in one of the chairs will
not hold air. Is this repairable? Do they come apart and have replaceable
seals? All advice appreciated.

Ivan Vegvary

Kragen's and various other auto supply stores used to sell a device
that is like a short piece of rubber hose with two hoseclamps on it.
Place the device on your air-shock and tighten one clamp on the
cylinder and the other on the piston rod. Adjust till you get the
desired holding power.
Engineman