What are those strands in my brand new copper filter an I see these white strands inside both air holes

[MarksmanPete]

Weird anyone else have this? Brand new filter some kind of white strands inside. https://www.ebay.com/itm/192985783901

 

[MarksmanPete]

My mentioning of a check valve was to illustrate where a stray piece of teflon tape can lodge and prevent designed operation. I don’t know where in your pneumatic circuit where you’re seeing contamination. If it’s after the compressor valves it most likely doesn’t matter, especially since you have a couple filters post compression. Happy shooting.

Yeah thats what I though shouldnt matter no big deal whatever it does the job.