Order No. :
RT-RMQDS (Agular Contact Bearing)
RTQDS-D (Deep Groove Bearing)
RMQDS-G (Germany Myonic Bearing)
Compatible with NSK NMC-SU03
And the following NSK handpiece models:
Mach-Lite XT S
Mach 2 S
AW300L/AB300L
AK300L/AS300L
Mach QD-S
NL75/85 Mach Lite S
MLXT-SU
MC2-SU
About Bearings:
Deep Groove Bearing:  Deep groove type ceramic bearings.
                                     (The bearing works more than 6 month with good maintaining)
Agular Contact Bearing: The best Rito Dental Angular Contact Ceramic Ball Bearings.
                                        (The bearing is Less Noise, works about 12 months with good maintaining)
Germany Myonic Bearing:  Germany Myonic Angular Contact Ceramic Ball Bearings.
                                           ( The bearing is more quiet and stable, works more than 12 months with good maintaining)