Upgraded endbell bearings by Double Ceramic Construction Full ceramic medical grade construction (Balls and races are both fully ceramic) Features White in color Increased motor efficiency and RPM To increase the life of this bearing it is recommended to lubricate the bearing everyday it is used, and also do not clean with any acetone based cleaners. Source Double Ceramic: https://www.doubleceramic.com/colle...uble-ceramic-full-ceramic-bearing-set-of-2pcs
