Order No. :
RT-R6000-D (With Deep Groove Bearings)
RT-R6000 (With Angular Contact Bearings)
RT-R6000-G (With Myonic Angular Contact Bearings)
Compatible with Kavo 6000 
Quiet --- The rotor is balanced !
Long Life --- Build with Angular Contact Ceramic Ball Bearings !
About Bearings:
Radial Advance:  Deep groove type ceramic bearings.
                           (The bearing works more than 6 month with good maintaining)
Agular Contact: The best Rito Dental Angular Contact Ceramic Ball Bearings.
                           (The bearing is Less Noise, works about 12 months with good maintaining)
Germany Bearing:  Germany Myonic Angular Contact Ceramic Ball Bearings.
                           ( The bearing is more quiet and stable, works more than 12 months with good maintaining)