MSI Ventus 3080 only?
Yes and no. Yes because this is designed to hug the Ventus' heatsink as snugly as possible, so unless other cards are of the exact same height post de-shroud, this would either be too tall / short. On the other hand, the ventus 3080, 3080Ti & 3090 from MSI all shares the same cooler so technically this also supports the Ventus 3080Ti & the 3090.
Noctua NF series only?
The fan shrouds here will only fit the NF-A/F/S12, I've also released versions for the Arctic P12 & Generic 120mm Fans.
How to mount?
There are 2 ways to mount the shrouds to your NF series fans and they will require you to print different models:
NF-A12 model used in rendering by Kelvin Limanto
Heatsink model used in rendering by HDRI (Adapted)
The author hasn't provided the model origin yet.