At the time of writing, we only sell one thickness of shock pads, which is the 1/8″ thick ones (that’s 3mm in modern money). We might get more variations in if there’s some demand – drop us a message if you’d like some of the thinner or extra-chunky ones.
We’ve personally measured these shock pads at approx. 91a with our durometer, although there’s some variation either way from what we can tell.
Finally, much like the baseplates on a set of Bear Trucks, these risers are quad-drilled, giving you that bit more compatibility/versatility. No matter what your setup is, these shock pads should fit.