ZebraOptical Optoprofiler
Cast Iron Surface Plates
Laboratory grade AA (0.000025" per 6")
Inspection grade A (0.000050" per 6")
Contact us for custom higher accuracy options.

Cast iron is more dimensionally and geometrically
stable over time than granite or ceramics, and is more
easily worked to a higher grade of flatness.

It provides more uniform optically, being surface free
of the color and refractive index variation characterizing
granite plates.