The Kama Flow 2 fan has Extra Fluid Dynamic Bearing (EX-FDB) which comes with a group of "V" shaped grooves to achieve micron level thickness of oil lubrication in between the shafts housing for a longer life and silence. The MTBF of the Kama Flow 2 is 120,000 hours. This fan moves 21.39CFM at 16.9dBA and has both 3pin and 4pin connectors supplied. The fan is 92mm x 92mm x 25mm and weighs 95g.