In Win Launches Polaris RGB Premium Fan Series
 

In Win, best known to most for their PC chassis, announced its new Polaris case fan series. The new Polaris fans differ from their Aurora fan lineup in a few ways. First, the frame on the Polaris is not square but uses a round transparent frame. Second, the Polaris lineup is made for silence, while the Aurora is made for performance (having slightly higher CFM and static pressure values), and a different overall aesthetic; more of a traditional case fan look.

https://www.anandtech.com/show/11876...ium-fan-series