Precise Grade A, 48 x 36 x 6″ Black Granite Surface Plate – 4401-4836

• Surface plates are checked by an auto-collimator for overall accuracy assurance.
• This granite surface plates meet or exceed Federal Specifications GGG-P-463C.
• Ledge: 0
• Includes a certificate of inspection.
• Note that these are not NIST traceable.

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