NAGA "P" Series Ceramic bearing is made out of silicon nitride(SI3N4). It’s long life, high strength, high temperature, lighter, smoother, stiffer, harder, quiet corrosion resistant, electrically resistant, non-magnetic & and need for minimum lubrication make perfect for harsh conditions. These fundamental characteristics allow for a wide range of performance enhancements in bearings. Ceramic dissipates heat quickly, reducing friction and wear while maintaining a precision smooth surface.