Membrane Solutions 500 Pack Syringe Filter Sterile PES Hydrophilic Filtration 0.22um Pore Size, 33mm Membrane Diameter Sterile PES Membrane Individually Packed

Have used these multiple times and they've always worked really well. However, the last batch I had were clearly defective. They were absolutely impossible to push the the oil i was filtering though the filer. As I said, I've used these and never had an issue. I went through 30 filters trying to find one that I could actually use. My whole filtering process should have taken no more than 5 or 6 from start to finish. Not sure what the problem was but even with using a caulking gun to add some extra leverage, I still could barely get a drop at a time through these. Very frustrating! (Update) After my initial review, the seller promptly reached out and shipped me replacement filters at no cost to me. The replacements were exactly as they should be. They worked very well with no further issues. As I said in my previous review, I've have used these on multiple occasions and they've been great. The replacements worked perfectly.

They work really well, lock onto any lock lure device nicely. Filters out all the contaminants great! I just wish they were capable of attaching to any type of syringe, because that would be a huge game changer! For the price point and the fast delivery I can’t even remotely complain!

These work, but I don't have the equipment to verify how well they work. No leaks and they seem sturdy enough if you're only using each one once.

They work as expected. There was some leakage due to liquid pressure but if liquids are pushed through slowly that works better.

These are great for laboratory use. They appear to filter out the smallest particles (the color of the substrate is clear upon filtration), but I would recommend double filtration just in case. I have no scientific data supporting this but on the off chance you get a bad batch of filters, well it’s better to be safe than sorry. I’ve used these numerous times and so far they have been a success. These are a must have if using in a laboratory to filter out unwanted BINDERS from sticky products. Better to err on the side of caution. It can get pricey yes, but it beats the alternative. IFYKYK. Stay safe out there, practice good hygiene!

I can't really think of one thing I really have positive to say considering there's much better filters (same diameter, also 0.22μm, same cost). All these filter are heavy particles. A coffee filter would do an equally sufficient job. I went through 4 and still didn't end up with the same quality results as with 1 filter vs the filters I normally use (which I'm able to use a few times if I really need to). I don't know why these have such high reviews, honestly. They do not filter properly, period. This wasn't a bad one or two. I really question whether it's filtering bacteria and other particulate, dyes, etc. that it should be able to. These are incapable of removing the color from what I filter after 4 filters, and those are larger molecules than bacteria. I've been using filters like these in all different brands for about 10 years and I think these are by far the absolute worst I've come across. I had to get right back in on here and order the ones I would normally. So a waste of money, useless, and potentially dangerous depending on what you use it for. The only reason I'm bothering to review these is because they have great reviews for some reason and I noticed some people are trusting these to filter for IVDU. These are dumpster material. You are not getting all that you think you are getting out. The white plastic ones really any brand on here are so much better.

High quality filters that twist and lock easily. Very simple to use, just push the liquid through them. You can even see what it filters out because the chamber where it keeps everything it takes out is transparent-ish. Would recommend.

Works great no leaks or plugs

Excelente producto