Great Times Six Ball Bearings with Black ball ceramics are the highest grade black ball ceramic speed bearings around.The lighter ceramic balls help accelerate faster and provide less friction, and because of the strength of a ceramic the bearings self-heal when outside debris invades the insides of the races.
-Black ball ceramic balls
-Stainless steel races
-Dual non-contact removable shields
-High-speed nylon retainers (lighter than metal and impact resistant)