1. Miniature
2. Single row in metric and inch dimension
3. Single row deep groove ball bearings with filling slots
4. Double row
5. Precision and Low noise
6. Stainless steel with food grade grease
7. Hybrid - ceramic ball + steel rings
8. Complete ceramic ( ZrO2, Si3N4 )
9. Super high speed ( 150,000RPM -500,000RPM )