318.448
- Gauge ball, 30 mm 
- made of ceramic (SI3N4)
- hardness > HV 1400 
- accuracy 0.003 mm
- shape tolerance 0.08 um
- roughness 0.01 um
Information on product safety:
      - Only suitable for technically experienced users and tradesmen who are familiar with the product..
- Only suitable for the intended purpose.li>   
- Improper use can lead to damage and injuries.li>  
  Importer/supplier:div> 
  Gimex Dr. Gao Imp/Exp. GmbH, Merkurstr. 23,  67663 Kaiserslautern / Germany, email: Info@gimex-messzeuge.de