Si3N4 rollers
TOJO has different balls & rollers in different materials, the materials can be:
Plastic:POM,Teflon,PEEK......
Steel:Carbon steel,100Cr6(AISI52100),AISI440, AISI420,AISI316L,AISI304......
Ceramic:ZrO2,Si3N4,Al2O3
The precision grades can be G5,G10,G16,G20,G40,G100......