Dec 05, 2013 · The common pore sizes are 0.45um and 0.20um and they're used for pressure filtration of culture media or injectables. I used to use them all the time in cell culture labs. They get the generic name of "syringe filters" because they have a luer-lock and you can lock them onto a syringe to force your media through one.
6Pcs Regular Mouth Mushroom Liquid Culture Lid Grain Spawn Cultivation Mason Jar Lid with 0.2 Micron PTFE Syringe Filter & 20mm Self Healing Injection Ports for Mushroom Growing Mycology 4.5 out of 5 stars 109