These screens are surprisingly excellent I swear because, first I never purchased them to actually replace the screen in my TM dry cooling stem, but I am now using the same size screen in the glass water pipe adapter which gigantically reduces any particle build up, also resin etc in my clean bubbler.
As well- managing the bowl for total optimum performance for much much longer is really easy because with the screen at the bottom the glass holes never get gummed up, as usual quickly reducing airflow enough.
I typically brush out the bowl in between as I often turn once, and after, keep holes open brush screen and torch every 3 loads too, otherwise easy ISO dip with other tools etc, when!
My Mobius Ion Matrix stays so much fresher to vape through not just visibly cleaner and is always so easy to clean as well now.
I lose no performance nor airflow either with the screen, in theory it is better- without the screen in the WPA the hot air can never flow around and underneath the bottom layer of herb, with it it does also creates extra air room and surface area underneath to flow into the WPA holes underneath.
But main point now, the screens! Wow they are solid uniform and robust as screens come. I envisaged, needing replacements! For “old” ones lol truth is I do need replacements, but only for when I stupidly lose them one by one (I have a history of this lol)
Wicked Tinymight screens which are a perfect fit for the glass WPA too and should last a lifetime too. They are like 100% flat as well, still, and never appear to alter on that.