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G-85011 12" x 18" x 4" Surface Plate 85011

Superior Black Granite Surface Plate
12" x 18" x 4" Superior Black Granite Surface Plate - Grade AA, 2 Ledges

12GÇ¥ x 18GÇ¥ (300mm x 450mm) Superior Black Granite Surface Plate with a 4GÇ¥ (100mm) thickness. Superior Black Granite has low water absorption, creates little glare and minimized thermal expansion Grade AA (Laboratory Grade) for precision operations in constant temperature gaging rooms and metrology departments. .000050GÇ¥ (0.0012mm) Flatness unilateral tolerance. Produced with 2 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.


  • Made in America: Yes
  • Size LxWxT (in): 12 X 18 X 4
  • Grade (U.S.): AA Laboratory
  • Size LxWxT (mm): 300 X 450 X 100
  • Ledges: Yes


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