100 Count Syringe Filter, Nylon Hydrofilic Membrane 13mm Diameter 0.22um Pore Size, Syringe Lab Filters, Non Sterile Filtration (Green)

Would and have purchased again

They work fine but just be aware when ordering that the PES filters are actually MCE. Check back often because they often have great prices.

These filters seemed like a great option, however, the luer lock fitting did not mate well with all of the syringes in our inventory. Leaks were common except when using some of the lowest quality syringes

Thought these were okay at first, before I had a comparison with a filter that *actually* had a prefilter in it. Unlike what it says in this item's description, these do not have a GF (glass fiber) prefilter. I contacted the seller: apparently *none* of LabZhang syringe filters come with a GF prefilter. I'm assuming they got away with it for so long because the plastic housing around the membrane is welded shut & practically impossible to separate. It takes a Dremel tool or something similar to get these open; which is how I confirmed that they only have a single membrane.Have contacted both the seller and Amazon about this fraud/false-advertising multiple times. They both said they would remedy this, but they haven't, which is why I'm taking the time to write this! (Amazon has so far only been willing to refund a small portion of the money spent on 5+ orders)If you want an affordable solution for PES membrane-only filters, these work alright. One other issue is that the containers holding the filters are weak; and Amazon ships them in a flimsy envelope. That combo makes it so they are apt to burst open and spill all over the envelope; making cardboard filaments, other debris, etc get into the outlet of the filters, completely defeating their purpose.

Your description is contradictory.