Top Power (TOP-FAN-12NB) 120x120x25mm NANOTEK Bearing Fan - Blue LED

Lubricant Free. Operation in extreme temperature from -40 to 100 degree Celsius guaranteed!
In 60 degree Celsius
operation environment, traditional ball-bearing and sleeve-bearing fans
are likely fail due to thermal expansion contraction and lubricant dry
out.
In contrary to traditional bearings, Nano technology needs no lubricant.
Nano fan passed rigorous test and operating 4 hours under 100 degree
Celsius environments and no worries for lubricant leak or dry-out. The
Nano bearing shaft has low expansion coefficient and runs smoothly in
tough environment conditions.

Remark:
-New production uses lubricant for easy assembling parts. Nano fan does not require lubricant.
-Test setup compliant to MIL-STD-202

Waterproof, Dust-proof (IP 5 / 6)

Because there's no
lubricant needed, Nano fan is both water and dust proof and compliant
to EN60529: 1991-IP5X (dustproof test) and EN60529: 1991-IPX8 (water
proof test).

Nano fan can be dissembled for
wash and making it always stays in best condition, yielding low noise
and maximizes air flow. Even the traditional ball-bearing fan with dust
and water treatment, it is likely to fail due to excessive friction
between the dust and rust, and lubricant leakage.