Anyone heard of Fonsan fans? How do these look? (link)

[Valvoline6]

Is there a Fonsan web page? I'm wondering if they are ball bearing fans. Here is the link to a spec sheet.
The DFB0812H is the one I'm interested in. If anyone has used these how are they?

 

[Valvoline6]

Bump.

 

[tonyou]

The spec for DFB0312H seem quite good, it pushes 36CFM at noise level below 30dBA. Not bad at all! At least when compared to the fans I know...

Tony