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I have seen disks stuck to flasks that look like discoloured medical bandaged are these PTFE?

April 26, 2017bandaged discoloured disks flasks look medical PTFE seen stuck

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I have seen disks stuck to flasks that look like discoloured medical bandaged are these PTFE?

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• Some orchid flaskers use medical bandages to vent their flasks. These suffer from discolouration, and often need to be applied both internally and externally. They are not PTFE vents, and suffer from clogging and swelling fibers over time – leading to a drop off in efficiency of air flow and filtration. Our PTFE vents are glistening white!