Hi WhiteRook
There are many types of vibration isolators. The type I have seen here has a bonded steel sleeve on the inside diameter that determines the compressed height. You tighten it as far as you can. It is best if you have a picture or drawing to look at since there may be other components required, plus there is a geometry that you have to follow. You can Google Lord Vibration Isolators and probably find their catalog that will show how the isolators are mounted or used. I hope this helps.