have you tried them?
those look to be designed for “pour through” not centrifugation.
I find it unlikely that they will stay at
in 50ml falcon tubes when one turns gravity up to 2-3K
what do you imagine the right micron rating to achieve that would be? (have you read Can I separate fats and waxes from my hte using a centrifuge? ?)
IMO that’s a “pellet them” (sedimentation rather than filtration) trick, although I’m reasonably sure @MagisterChemist has data to the contrary.