Mirka sander vakuum adaptor

I needed a thing to connect my Mirka Ceros sander to my shop vac.
Had some hoses from an old vac lying arround 40mm outer diameter, 31mm inner diameter.

So I made this thing fitting into the sander. As my hose has a little thread on the inside I added the counter part on the adaptor.

To fix the hose tidally I added the clamp fitting on the 40mm hose.

:-)