Question about NZXT AB-RH175-B1

I bought the mount but ended up mounting the card normally anyway. I can pass the mount on to you if you like.

Also fits the H6

Yes, I have the H6 Flow myself and it fits perfectly. Lg

Officially from NZXT: Fits perfectly with the cases and colour schemes of the NZXT H5, H6, H7 and H9 series.
So yes

Yes, but it doesn't look so good

I am very satisfied

NZXT Vertical GPU Mounting Kit (model AB-RH175-B1) is officially compatible with the NZXT H6 Flow case. According to NZXT, this kit was specially developed for the H5, H6, H7 and H9 series cases.