Stumbled across these while looking for Thermalright stuff. They aren't listed on the thermalright site... not even the chinese site which from what I understand will often have new products listed ahead of the international site.
I think these might be really great for sff since most 92mm fans don't have very "pressure optimized" blade designs. Even the nf-a9, which as far as I can tell is the top 92mm fan, doesn't look like a modern static pressure optimized design. These look a bit reminiscent of a miniature t30 or arctic p12 to me. There's definitely some similarity to the A9 going on, but they do look like they close up a bunch of the empty space/gaps from blade to blade and blade to frame vs the a9.
Thermalright's tl-b12 fans are their static pressure variant and supposedly pretty solid (from what I've been able to dig up they seem to perform right in the pack with the rest of the GT clones.. a12, toughfan, wonder snail, etc.). So this having the "b" in the name indicates to me it's intended use is on heatsinks, which is pretty cool since 92mm fans are typically airflow or "dual purpose" optimized. Noctua will still have the motors beat I'm sure but thermalright motors are apparently pretty decent regardless, and the blade design looks superior vs the A9 when it comes to heatsinks. Maybe this can dethrone the a9 for users of the u9s, 92mm top down coolers, gpu deshrouders who use 92x25mm fans, etc.
I couldn't find the tl-b9b (black variant), although it's mentioned in the pics of one of the links below. Maybe it's just a matter of time for the black one to release, or perhaps someone who is fluent in Chinese can dig em up on taobao (it's a bit of a struggle for me using taobao lol).
TaoBao links: here, and here
Aliexpress: here
Thoughts?
