China ceramic bearing is major product of FreeRun, which has their own factory.

Ceramic bearings are made from a compound called Silicon Nitride. The Silicon Nitride compound is far lighter than your run of the mill steel bearing, 60% lighter in fact, and they are significantly harder than that of their metal counterparts. These bearings operate at an 80% faster speed than that of standard bearings and they also self lubricate. Not only are they made to withstand extreme physical impact, they also perform exceptionally when under harsh circumstances, such as high temperatures, lack of lubrication, and in high corrosion environments.

Ceramic bearings are popular because they are stronger, reduce friction, and last much longer than the typical metal ball bearing. Many companies produce ceramic bearings today and many serious skaters prefer them for the best ride.

FreeRunproduces ceramic bearing such as ceramic deep groove bearings, ceramic thrust ball bearings, ceramic angular contact bearings, ceramic self-aligning bearings, ceramic flanged ball bearings, ceramic ball and ceramic components.

Welcome to visit and contact FreeRun for your ceramic bearings!

http://www.freerunbearing.com/products/Ceramic-Bearings/564.html