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⚡ Filter smarter, not harder — precision meets speed in every circle!
StonyLab Quantitative Filter Paper Circles deliver precise 94mm diameter filtration with 20 micron particle retention and a fast 35-70 second filtration speed. Designed with ultra-low ash content (≤0.01%) for minimal residue, these cellulose filters are perfect for efficient, clean lab work and are fully compatible with StonyLab Porcelain Buchner Funnels. Ideal for professionals seeking reliable, cost-effective filtration solutions.
| Customer Reviews | 4.3 out of 5 stars 412 Reviews |
G**Y
good product
came quickly and my fault i got the wrong size
B**N
Absolutely perfect for the price
I am not filtering anything that would require the same performance/features as say a medical counterpoint, but I can attest to the fact that this filters indeed work. I've run them singularly and in pairs through a Buchner funnel with a vacuum pump (really just a relabeled aquarium pump lol) with great success. I achieved my desired results which was the removal of fine particulates from Everclear. Be forewarned, even though StonyLab produces these filters and supposedly their Buchner funnels (mine has a stamp indicating the mm of the funnel directly above a sticker that says 'StonyLab 100mm' that is laughably crooked) these 94mm are just slightly too large to rest flat in their 100mm Buchner funnel. TL;DR - They do the job at the perfect price point.
R**A
Great Filter for your lab work!
I use these filters in conjunction with a vacuum beaker and vacuum pump, which speeds the process!
G**L
Works
It’s nice to get something that works like it’s supposed to. Thank you
I**Y
Vacuum filtration apparatus
Items shipped properly and quickly. Quality glassware, will buy again from supplier.
E**I
DO NOT BUY.
The 94mm papers I ordered were the same as the 100mm filters I ordered so I downsized and these are obviously too small. I guess Stonylabs really lives up to their name because they can't get me the proper filters dor their product. I am to the point where I'm going to return my filtration setup as well because I really don't have time for these games. They also seem to like to reject my reviews so if that happens again, I'm going to file a complaint with the FTC as I should be able to trust in what I am purchasing. If I can't do that, and get censored for calling attention to it, then I'll just find a regulatory commission to file a report with.
G**S
Good product
Very satisfied with my purchase. Works very well. Two thumbs up.
A**R
Reliable and fast
Reliable quality. Fast shipping.
J**H
Parfait
Nickel !
A**G
tremenda calidad
muy buena calidad
A**R
Needed
Fits the bowl, thanks.
A**E
Top
Wie beschrieben. Liefern lassen und benutzen. Macht das, was es soll.
Z**A
Perfect to my labtests
Everything is perfect: very quick delivery and the filters ate exactly what I want to buy.
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