FEATURES:

Ceramic standard balls are manufactured from ZrO2 and Si3N4. The diameters range of balls from 2 to 30mm and roundness is 0.08μm，can be used for reference ball and measuring ball of the CMM. Extraordinary, these hollow balls fix easy and reliable.

       SIZE:   2mm，4mm, 5mm，6mm，10mm，19.05mm，20mm，25.4mm，30mm