Product: HHIP 4901-2705 10 x 6 x 1" Precision Granite Square, Black
Brand: HHIP
Color: Black
Squareness is ± .0.0002".
Black granite squares are more durable than pink granite and help to avoid scratching.
A calibration test sheet from the manufacturer is provided.
Square has a round hole so it weighs less and is easier to handle.

Search query: calibration surface plates
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