what kind of shock is this?

its on my 1997 mount vision

Stratos Helix

were around before specialized err sued them out of the business.

coil with an air spring too. quite good - had a similar on a Turner. very tunable.

any good?

Yep,

yay the rebound dial just turns with no clicks or anything and it makes a squeltch noise when you get on it think it might need refurbed

ahh in which case you SOL. they are great when working but due to being out of busess then you are going to find parts difficult.

In working order they are great. from memory the rebound dial on min didn't click either and made no difference really till the last third of its adjustment

i'll pump it up and see if it holds air but its been sitting for years never used

You should never cycle a Stratos shock through it's travel with no air in it. It will cavitate, and need to be burped. I have the instructions for burping them on my comp at home (I'm at work now).