It's not really a fuel filter. Or technically it is, but it's really a suppressor kit sold as a fuel filter. You may also hear them called or sold as "solvent traps". This is largely because a suppressor is largely a safety and convenience device, but acquiring one legally is a painful, multi-month process with a $200 tax. You can make one legally by filing a form 1, but it is generally understood that the wish.com "solvent traps" or "fuel filters" will not necessarily be used legally.
And I'm with you - I probably wouldn't want to put a wish.com-sourced fuel filter on a firearm any more than I'd want to put it on any machinery.
And I'm with you - I probably wouldn't want to put a wish.com-sourced fuel filter on a firearm any more than I'd want to put it on any machinery.