-DURA Tech  Bearing-

The outer race of the the Jetstream Pro Dura Tech HS is made of Teflon composite material, eliminating the corrosion of metal materials and extending the lifespan. Utilizing Teflon Compound Material  and Ceramic Balls makes the Jetstream Pro DT HS not only 50% lighter than a comparable Steel Headset, it enhances the durability significantly: The CNC machined Teflon race provides an excellent lubeless rolling surface. No need for additional lubrication, no more worries about the complex process of disassembling and assembling the headset. 
 

G3-grade perfectly round ceramic balls create lower rotational resistance, allowing your power better to convert to speed.

DURA Tech Bearings have a Nano coating on inner races, This dry film can minimize the coefficient of friction to as low as 0.03 dynamic, and 0.07 for static. The Nano Coating overcomes or reduces mechanical lubrication problems improving performance and extending service life >300%

 

-P05 Steel Bearing-

The TRiPEAK S-Series features Po5 precision steel ball bearings, for reassuringly high smoothness and durability. 0.005 mm for eccentricity (out of roundness) of the track in the inner race. That´s precise.