What rubber was Félix Lebrun using at the Paris 2024 Olympics? Tibhar K3 or K3 Pro on both sides?

[nontrivial]

And what is he using now?

 

[Julzig]

Heard somewhere that he and his brother use K3 with 57° hardness. Dont have a source and forgot whether I read it here or heard in a video

 

[Tony's Table Tennis]

I also remember it is K3
but it is special for sure, so maybe this was a pre market K3 Pro? we will never know

 

[piligrim]

Why this important?