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G-85006 12" x 12" x 4" - Grade AA, No Ledge 85006

12” x 12” (300mm x 300mm) Superior Black Granite Surface Plate with a 4” (100mm) thickness. Superior Black Granite has low water absorption, creates liittle glare and minimized thermal expansion Grade AA (Laboratory Grade) for precision operations in constant temperature gaging rooms and metrology departments. .000050” (0.0012mm) Flatness unilateral tolerance. Produced without ledges.

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  • Low water absorption minimizes the possibility of precision gages rusting while setting on the plates.
  • This black granite creates little glare resulting in less eyestrain for individuals using the plates.
  • Keeps thermal expansion to a minimum.


  • Size LxWxT (in): 12 X 12 X 4
  • Grade (U.S.): AA Laboratory
  • Size LxWxT (mm): 300 X 300 X 100
  • Ledges: No


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