Suspension Question - what is this? Ohlins DFV

Can't find what purpose this part below does. Anyone have any ideas? This might be the only place I can think of that might have someone who's played around with suspension a bit.

From Ohlins Road & Track (DFV)

It looks like it's just sitting on top of the shim stack, not sure if it's something to do with the DFV, or just a spacer.

We uses spacers there to control the extended length of the damper. Depending on suspension design, this might be a droop limiter, allowing us to pre-load the springs and not raise the ride height.

Thanks for the reply David! That's very interesting... I am chasing a little more droop travel... well, travel in general.

I assume that part is resting on a step in the shaft - like in the picture below. There's probably no way of removing the spacer and using the extra droop travel is there? I guess you would need a new shaft, with the shoulder further down. Or a tight tolerance sleeve. Otherwise, I see it causing issues in the seal block

You wouldn't have any photos of how you do it in some of the race cars you're willing to share would you?

To increase travel you will need a longer damper body (and a shaft). I don't have any dampers disassembled right now, but here is a picture of some of the spacers we use: