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Hydrophilic PTFE Syringe Filters 25mm Diameter 0.22μm Pore Size for Laboratory Filtration by Finetech (Pack of 20) Made in Taiwan (PTFE Hydrophilic 25mm 0.22um, 20): Amazon.com: Industrial & Scientific
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Syringe Filters, Polytetrafluoroethylene (PTFE), Hydrophilic, 0.45um, Sterile, 25mm, 100/pack | Southern Labware
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Syringe Filters PTFE Hydrophobic 25 mm 0.22 um Non Sterile 25/pk by KS-Tek: Amazon.com: Industrial & Scientific
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