M3 Ruby Ball 30MM and 31MM Length
A= Ball Size
B= Stem Diameter
Effective Working Length (EWL) is the penetration that can be achieved by any ruby ball stylus before its stem fouls against the feature. Generally, the larger the ball diameter, the greater the EWL.
****Most Styli are also available with Silicon Nitride or Zirconia Ball Material.****
Please call for pricing