Hello, the Plantronics D100-M is the USP adapter and different headsets can be used. Therefore, the question is not easy to answer. I am using the Savi w720. These ear cups fit this headset very well.

It was a while ago, but I bought these pads using the search term Plantronics D100-M and they fitted perfectly.

Dear Markushäns1
I think I have a D100 in the office. Unfortunately, I won't be back in the office until 8 January and won't be able to check until then. As I have a new PC at home and the headset for the home office has not yet been set up, I unfortunately can't find out anything.
I'll be able to say more on 8 January. But the ear pads fit perfectly.
Best regards, Kobeli5