Silverstone FHP141 Fan @ TechPowerUp
 

The Silverstone FHP141 is a 38 mm thick, 140 x 140 mm fan that can be mounted to a single 120 mm fan slot. By virtue of the added space to the motor and rotor, and some other tricks up its sleeve, it aims to provide an excellent balance of performance and noise for those low on radiator space.

https://www.techpowerup.com/reviews/Silverstone/FHP141/