Review on StonyLab Cellulose Retention Filter for Precise Quantitative Filtration by Jake Pavelko

I don't filter anything that requires the same functions/properties as say medical counterpoint, but I can attest to the fact that these filters work. Vapor through a Buechner funnel with a vacuum pump (it's actually just a rebranded aquarium pump lol) with great success. I've had the desired results, which is the removal of small particles of Everclear. Be warned though, although StonyLab makes these filters and presumably Buchner funnels (I stamped a mm funnel just above the sticker that reads "StonyLab 100mm"). that's ridiculously crooked) these 94mm are too big to lay flat in their 100mm Büchner funnel. TL; DR - They do their job at the perfect price.